2312 November~December 14 HPC (SP MTG)102 West Main Street \ Prattville, AL 36067 \ 334. 595.0500 \ prattvilleal.gov
BILL GILLESPIE, JR.
MAYOR
J.SCOTT STEPHENS, AICPDIRECTOR
CITY OF PRATTVILLE
HISTORIC PRESERVATION COMMISSION AGENDA December 14, 2023 4:30 p.m.
Call to Order:
Roll Call: Chairman Miller, Vice-Chairman Stewart, Mrs. Davis, Mr. Ferguson, Ms. Fritz, Ms. Rollins, and Mr. Sanford.
Minutes: October 26, 2023
Committee Reports:
Old Business: None
New Business: 1.COA2312-01 Certificate of AppropriatenessNew Residential Construction 242 N Chestnut Street Nelson Vincent, Petitioner
Public Hearing
2.COA2312-02 Certificate of Appropriateness [POSTPONED] Alterations & Rehabilitation 220 1st Street Jason & Thea Langley, Petitioners
Public Hearing
Miscellaneous: Expedited Approvals:
Adjourn:
Page 1 of 4
Historic Preservation Commission
Staff Report
CERTIFICATE OF
APPROPRIATENESS
242 N Chestnut St. – 2312-01
DATE
December 14, 2023
PROPOSED DEVELOPMENT
Petitioner: Nelson Vincent
Property Owner: Same
Location: 242 N Chestnut St. (Southeast corner of Chestnut and 6th
Street)
Review Status and History
Previous Approvals: N/A
1984/2007/2023 Historic
Properties Inventory
Details
N/A
Proposed Alteration, Renovation, or Addition
The following alterations have been requested by the applicant.
1. Construct a single family 2 bedroom, 2-1/2-bathroom 1100 ft2 home with a one (1) car detached garage.
STAFF EVALUATION:
Page 2 of 4
Reviewed by: Joshua McKinney, Planner
Recommendation: Approve
Evaluation:
Construct a single family 2 bedroom, 2-1/2-bathroom 1100 ft2 home with a one (1) car detached garage.
New Construction (Residential) (pp 36-38):
The Construction of new structures on empty lots within the historic district is encouraged and is an important facet of maintaining the integrity of the historic district. Like other not-contributing structures within the historic district, new construction should fit into the character of the district, but should not try to imitate historic buildings. New buildings should draw inspiration from the surrounding architectural styles while maintaining a contemporary feeling.
New Construction Design
1. New construction shall draw inspiration from historic architectural elements and styles adjacent to the new building. For example, many historic residential buildings in Prattville feature a front porch, raised foundation, and either a gable or hipped roof.
a. Avoid architectural designs which have no basis in the historic district. For example, while the Mission style is a historic architectural style, it has no precedent within the historic district and shall be avoided. b. Though the overall design of new residential buildings should be compatible with the architectural styles of nearby historic structures, the new buildings should be simpler. Avoid new construction that tries to mimic a historic style too closely, creating a false sense of history.
2. Building entrances shall be oriented in a way that is compatible with nearby residential structures in the historic district. Typically, this is orienting the entrance towards the street. Corner lots may have a building orientation towards either street along which it has frontage
3. Established setbacks and spacing patterns shall follow what is found along the block.
a. Any setback and spacing requirements shall also meet the underlying zoning district requirements. b. When a variety of setbacks are found along the block, use the median of setbacks as a guide for new construction. . Size, Scale, Rhythm, and Massing 1. New construction shall reflect the scale and rhythm of other historic residential structures along
the block by incorporating the following elements:
a. Similar floor-to-floor heights
b. Similar foundation heights.
c. Similar window locations and window proportions.
d. Similar façade and entry elements such as porches.
Page 3 of 4
e. Similar roof form types.
2. New construction shall be of a similar size and massing to other residential buildings located nearby in
the historic district.
a. One and two-story houses are the predominant residential building types found in the Prattville
Historic District.
b. New construction shall not be so massive that it dwarfs the size of nearby residential structures.
3. When a new structure is constructed behind an existing residence on the same lot, it should be
subordinate to and not overshadow the main structure
Architectural Features and Elements
1. Roof forms, heights, and slope for new construction shall be similar to nearby residential structures within the district. For example, a flat roof form would not be appropriate on a block with hipped and gable roofs.
2. Windows, doors, and other openings shall be compatible in terms of size, spacing, pattern, configuration,
and material construction with nearby structures in the historic district. Window and door configurations
and styles which have no historical basis within the district shall be prohibited.
3. Porches shall be compatible with surrounding historic residential buildings.
a. Porches shall be positioned to maintain the historic pattern of porches found along the block.
b. Porch elements such as steps, columns, and railings shall be of a similar style and material composition
to nearby historic structures, though they should be simpler in execution.
4. Decorative elements such as dormers, brackets, columns, skirting, and other architectural features are
appropriate, but they should not mimic the more grandiose elements found on some historic structures.
Simpler, less detailed architectural elements are appropriate and help to differentiate new structures from
historic ones.
Materials
1. Materials for new construction shall be of a similar design, profile, shape, style, and composition to what
was used with nearby structures.
a. Siding such as wood, engineered wood, and composition board siding are appropriate as long as they
are of a similar appearance, size, and shape to what is found on nearby historic structures.
b. Masonry, brick, and stone shall remain unpainted.
2. New construction shall avoid using a wide variety of different materials unless nearby historic structures
have a similar composition.
Page 4 of 4
3. Roof materials shall be of a similar construction type, style, and material to what is found on nearby
structures.
ACCESSORY STRUCTURES
New Accessory Structures
1. New accessory structures that are visible from the right of way shall be compatible with the style of the
main structure.
2. New accessory structures shall be subordinate to the main structure.
3. New accessory structures shall be constructed of materials similar in pattern, texture, and appearance to
the main structure.
4. Pre-fabricated accessory structures such as tool and storage sheds may be appropriate if they are
shielded from the right of way.
5. Storm shelters shall not be visible from the right of way, or shall be made to have a style that is compatible
with the style of the main structure.
6. On properties with alleyway access, locate new garages along the alleyway when feasible.
Evaluation: The property is currently a vacant lot. The petitioner is proposing to construct a single family 2 bedroom, 2-1/2-bathroom, 1100 square foot home with a one car detached garage. The house will be 18 ft tall overall on a slab foundation. Exterior cladding will be wood and hardie board siding. Roof will be composition asphalt architectural shingles. 4x4 panel windows and wooden doors. Detached
Garage will have similar material as principal structure (elevations not included in application).
7TH ST
E 6TH ST
N COURT ST
W 6TH ST
W 5TH ST
E 5TH ST
PINE ST
N CHESTNUT ST
MARTIN LUTHER KING JR DR
N WASHINGTON ST
RAILROADST
BRANCH ST
Location Map
±0 400200
Feet
Locations are approximate
Project Area
Prattville City Limits
Autauga Parcels
E 6TH ST
W 6TH ST
N CHESTNUT ST
RAILROAD ST
MARTIN LUTHER KING JR DR
Aerial Map
±0 200100
Feet
Locations are approximate
Project Area
Prattville City Limits
Autauga Parcels
7TH ST
E 6TH ST
N COURT ST
W 6TH ST
W 5TH ST
E 5TH ST
PINE ST
N CHESTNUT ST
MARTIN LUTHER KING JR DR
N WASHINGTON ST
RAILROADST
BRANCH ST
Zoning Map
±0 400200
Feet
Locations are approximate
Project Area
Prattville City Limits
Autauga Parcels
B-2
M-1
O-1
R-2
R-3
Important:
Contractor/Builders shall verify all conditions and
dimensions before beginning construction. Any
discrepancies shall be reported to LifeStyle
Design Service for justification and/or corrections
before proceeding with work. Contractor/Builders
shall assume responsibility for all errors that are
not reported. (888) 266-3439
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discrepancies shall be reported to LifeStyle
Design Service for justification and/or corrections
before proceeding with work. Contractor/Builders
shall assume responsibility for all errors that are
not reported. (888) 266-3439
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Important:
Contractor/Builders shall verify all conditions and
dimensions before beginning construction. Any
discrepancies shall be reported to LifeStyle
Design Service for justification and/or corrections
before proceeding with work. Contractor/Builders
shall assume responsibility for all errors that are
not reported. (888) 266-3439
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Important:
Contractor/Builders shall verify all conditions and
dimensions before beginning construction. Any
discrepancies shall be reported to LifeStyle
Design Service for justification and/or corrections
before proceeding with work. Contractor/Builders
shall assume responsibility for all errors that are
not reported. (888) 266-3439
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N1
IMPORTANT DISCLAIMER
THE ENCLOSED INFORMATION IS INTENDED TO ASSIST AND INFORM YOU
THROUGH THE CONSTRUCTION OF YOUR HOME. YOUR CONSTRUCTION
PLANS HAVE BEEN DRAWN TO PRESCRIBE TO INDUSTRY STANDARDS.
THESE PROFESSIONAL STANDARDS DETERMINE HOW CONSTRUCTION
PLANS ARE DRAWN AND WHAT INFORMATION THEY INCLUDE.
CONSTRUCTION PLANS ARE INTENDED AS A TECHNICAL GUIDE TO
PROFESSIONAL CONTRACTORS AND ARE NOT INTENDED TO BE A SET OF
STEP-BY-STEP INSTRUCTIONS. THEREFORE, IF YOU ARE PLANNING TO
BUILD YOUR HOME WITHOUT THE SERVICE OF A PROFESSIONAL BUILDER,
WE SUGGEST THAT YOU BECOME THOROUGHLY FAMILIAR WITH READING
CONSTRUCTION PLANS OR CONSIDER CONSULTING A CONSTRUCTION
SPECIALIST. IF YOU SHOULD HAVE ANY QUESTIONS REGARDING THE
CONSTRUCTION PLANS AND/OR THE SUPPORTIVE DOCUMENTATION,
PLEASE FEEL FREE TO CONTACT US AT 1-601-336-3254.
GREAT CARE AND EFFORT GOES INTO THE CREATION OF THE DESIGN
AND ENGINEERING OF YOUR CONSTRUCTION PLANS. HOWEVER,
BECAUSE OF THE IMPOSSIBILITY OF PROVIDING ANY PERSONAL AND/OR
“ON-SITE” CONSULTATION, SUPERVISION AND CONTROL OVER THE
ACTUAL CONSTRUCTION, AND BECAUSE OF THE GREAT VARIANCES IN
LOCAL BUILDING CODE REQUIREMENTS AND OTHER LOCATION BUILDING
AND WEATHER CONDITIONS, HOUSE PLAN ZONE, LLC. NOR THE AGENTS
OR EMPLOYEES ASSUMES NO RESPONSIBILITY FOR ANY DAMAGES
INCLUDING BUT LIMITED TO, ANY DEFICIENCIES, OMISSIONS, OR ERRORS
IN THE DESIGN. IN ANY CASE, ANY DISCREPANCIES, ERRORS, AND/OR
OMISSIONS IN THE DIMENSIONS, AND/OR DRAWINGS CONTAINED IN THE
CONSTRUCTION PLANS SHALL BE BROUGHT TO THE ATTENTION OF
HOUSE PLAN ZONE, LLC. PRIOR TO COMMENCEMENT OF CONSTRUCTION.
PROCEEDING WITH CONSTRUCTION CONSTITUTES THE ACCEPTANCE OF
THE CONSTRUCTION DOCUMENTS 'AS IS' AND ANY DISCREPANCIES,
ERRORS, AND/OR OMISSIONS BECOME THE SOLE RESPONSIBILITY OF THE
PURCHASER. IF ANY ERRORS ARE DISCOVERED PRIOR TO
CONSTRUCTION HOUSE PLAN ZONE, LLC. WILL BE GIVEN FULL
OPPORTUNITY TO CORRECT ANY ERRORS AND/OR OMISSIONS TO THE
CONSTRUCTION PLANS. IN ANY OR ALL CIRCUMSTANCES, THE MAXIMUM
FINANCIAL LIABILITY TO HOUSE PLAN ZONE, LLC. CAN NOT EXCEED THE
TOTAL PLAN PURCHASE.
PROFESSIONAL SEAL
THOUGH EVERY EFFORT WAS MADE TO MAKE THE CONSTRUCTION
DOCUMENTS FOLLOW THE I.R.C. NATIONAL CODE METHODOLOGIES, A
FEW STATES AND CITIES HAVE PASSED BI-LAWS REGARDING
CONSTRUCTION PLANS THAT WOULD BE SUBMITTED TO YOU LOCAL
MUNICIPALITY AND USED FOR THE CONSTRUCTION OF YOUR HOME.
THESE BI-LAWS REQUIRE THE CONSTRUCTION PLANS TO BE REVIEWED
AND/OR PREPARED, INSPECTED, AND SEALED (OR STAMPED) BY A
LICENSED ARCHITECT IN YOUR STATE. IT IS ADVISED THAT YOU CONTACT
YOUR MUNICIPALITY'S BUILDING DEPARTMENT FOR INSTRUCTIONS TO
COMPLY WITH THEIR CONSTRUCTION PLANS REVIEW PROCESS.
COPYRIGHTS
REPRODUCTION OF THESE CONSTRUCTION PLANS, EITHER IN WHOLE OR
IN PART, INCLUDING ANY FORM COPYING AND/OR PREPARATION OF A
DERIVATIVE WORKS THEREOF, FOR ANY REASON IS STRICTLY
PROHIBITED. THE PURCHASE OF A SET OF CONSTRUCTION PLANS IN NO
WAY TRANSFERS ANY COPYRIGHT OR OTHER OWNERSHIP INTEREST IN IT
TO THE PURCHASER
EXCEPT FOR A LIMITED LICENSING RELEASE TO USE THE SAID PLAN SET
FOR CONSTRUCTING ONE AND ONLY ONE DWELLING UNIT. THE
PURCHASE OF ADDITIONAL SETS OF THE SAID PLANS AT A REDUCED
PRICE FROM THE ORIGINAL SET OR AS PART OF A MULTIPLE SET
PACKAGE DOES NOT CONVEY TO THE PURCHASER A LICENCE TO
CONSTRUCT MORE THAN ONE DWELLING. SIMILARLY, THE PURCHASE OF
REPRODUCIBLE CONSTRUCTION PLANS (A.K.A. SEPIAS, MYLARS, OR
VELLUMS) CARRIES THE SAME COPYRIGHT PROTECTION AS MENTIONED
ABOVE. IT IS GENERALLY ALLOW TO MAKE A MAXIMUM OF 10 COPIES FOR
THE CONSTRUCTION OF S SINGLE DWELLING ONLY. TO USE ANY PLAN
MORE THAN ONCE, AND TO AVOID AND COPYRIGHT/ LICENCE
INFIRNGMENT.IT IS NECESSARY TO CONTACT THE ORIGINAL DESIGNER
TO RECEIVE AND LICENCE FOR ANY EXTENDED USAGE. WHEREAS A
PURCHASER OF REPRODUCIBLE'S IS GRANTED A LICENCE TO MAKE
COPIES, IT SHOULD BE NOTED THAT AS COPYRIGHTED MATERIALS,
MAKING PHOTOCOPIES FROM CONSTRUCTION PANS IS ILLEGAL.
COPYRIGHT AND LICENSEE OF CONSTRUCTION PLANS EXISTS TO
PROTECT ALL PARTIES. IT RESPECTS AND SUPPORTS THE INTELLECTUAL
PROPERTY OF THE ORIGINAL ARCHITECT AND/OR DESIGNER, THEREBY
KEEPING IT POSSIBLE TO OFFER PRE-DRAWN PLANS AT AFFORDABLE
PRICES COPYRIGHT LAW FOR PRE-DRAWN CONSTRUCTION PLANS IS
NOW BEING VIGOROUSLY ENFORCED. COPYRIGHT INFRINGEMENT COULD
LEAD TO FINES OF UP TO $100,000 PER VIOLATION.
GENERAL SITE NOTES
1.CONTRACTOR TO VERIFY LOCATIONS OF SITE UTILITIES,
REQUIREMENTS, AND CONNECTIONS FEES. OWNER, CONTRACTOR AND
SUB-CONTACTORS TO PAY ALL OF THIER RELATED CONSTRUCTION
PERMIT FEES AS AGREED UPON BETWEEN THE OWNER AND
CONTRACTOR.
2.BEFORE EXCAVATION, THE CONTRACTOR SHALL EXAMINE ALL
DRAWINGS, MAPS, AND BUILDING SITE OF EXITING FACILITY TO
DETERMINE THE ROUTES OF ALL UNDERGROUND UTILITIES.
BEFORE DIGGING COMMENCES IT IS ADVISED THAT THE OWNER AND OR
CONTRACTOR CALL THEIR STATES UTILITY LOCATOR FACILITATOR.
3.IT IS RECOMMENDED THAT THE SITES SOIL BE TESTED FOR
COMPRESSION RATING TO DETERMINE FOUNDATION AND FOOTING
DESIGN. CONCRETE FOUNDATIONS AND FOOTING DESIGN SHALL BE IN
ACCORDANCE TO CHAPTER 4 OF THE I.R.C. CODE. SEE FOUNDATION
SECTION ON THIS PAGE FOR MORE DETAIL.
4.CONSULT A LOCAL CIVIL ENGINEER FOR SITE PLANS AND SURVEYS
OF EXISTING PROPERTY. A LANDSCAPE ARCHITECT SHOULD BE
CONSULTED FOR MORE EXTENSIVE LANDSCAPE DESIGNS.
CHAPTER 3 :: BUILDING PLANNING
SECTION R304 MINIMUM ROOM AREAS
R304.1 MINIMUM AREA.
HABITABLE ROOMS SHALL HAVE A FLOOR
AREA OF NOT LESS THAN 70 SQUARE FEET (6.5 M2).
EXCEPTION: KITCHENS.
R304.2 MINIMUM DIMENSIONS.
HABITABLE ROOMS SHALL BE NOT
LESS THAN 7 FEET (2134 MM) IN ANY HORIZONTAL DIMENSION.
EXCEPTION: KITCHENS.
R304.3 HEIGHT EFFECT ON ROOM AREA.
PORTIONS OF A ROOM WITH A SLOPING CEILING MEASURING LESS THAN
5 FEET (1524 MM) OR A FURRED CEILING MEASURING LESS THAN 7 FEET
(2134 MM) FROM THE FINISHED FLOOR TO THE FINISHED CEILING SHALL
NOT BE CONSIDERED AS CONTRIBUTING TO THE MINIMUM REQUIRED
HABITABLE AREA FOR THAT ROOM.
SECTION R305 CEILING HEIGHT
R305.1 MINIMUM HEIGHT.
HABITABLE SPACE, HALLWAYS AND
PORTIONS OF BASEMENTS CONTAINING THESE SPACES SHALL HAVE A
CEILING HEIGHT OF NOT LESS THAN 7 FEET (2134 MM). BATHROOMS,
TOILET ROOMS AND LAUNDRY ROOMS SHALL HAVE
A CEILING HEIGHT OF NOT LESS THAN 6 FEET 8 INCHES (2032 MM).
NOTE: SEE SECTION R305.1 FOR EXCEPTIONS
R305.1.1 BASEMENTS.
PORTIONS OF BASEMENTS THAT DO NOT
CONTAIN HABITABLE SPACE OR HALLWAYS SHALL HAVE A CEILING
HEIGHT OF NOT LESS THAN 6 FEET 8 INCHES (2032 MM).
EXCEPTION: AT BEAMS, GIRDERS, DUCTS OR OTHER OBSTRUCTIONS, THE
CEILING HEIGHT SHALL BE NOT LESS THAN 6 FEET 4 INCHES (1931 MM)
FROM THE FINISHED FLOOR.
SECTION R306 SANITATION
R306.1 TOILET FACILITIES.
EVERY DWELLING UNIT SHALL BE PROVIDED WITH A WATER CLOSET,
LAVATORY, AND A BATHTUB OR SHOWER.
R306.2 KITCHEN.
EACH DWELLING UNIT SHALL BE PROVIDED WITH A KITCHEN AREA AND
EVERY KITCHEN AREA SHALL BE PROVIDED WITH A SINK.
R306.3 SEWAGE DISPOSAL.
PLUMBING FIXTURES SHALL BE CONNECTED TO A SANITARY SEWER OR
TO AN APPROVED PRIVATE SEWAGE DISPOSAL SYSTEM.
R306.4 WATER SUPPLY TO FIXTURES.
PLUMBING FIXTURES SHALL BE CONNECTED TO AN APPROVED WATER
SUPPLY. KITCHEN SINKS, LAVATORIES, BATHTUBS, SHOWERS, BIDETS,
LAUNDRY TUBS AND WASHING MACHINE OUTLETS SHALL BE PROVIDED
WITH HOT AND COLD WATER.
SECTION R307 TOILET, BATH, AND SHOWER SPACES
R307.1 SPACE REQUIRED. FIXTURES SHALL BE SPACED IN ACCORDANCE
WITH FIGURE R307.1, AND IN ACCORDANCE WITH THE REQUIREMENTS OF
SECTION P2705.1.
R307.2 BATHTUB AND SHOWER SPACES. BATHTUB AND SHOWER
FLOORS AND WALLS ABOVE BATHTUBS WITH INSTALLED SHOWER HEADS
AND IN SHOWER COMPARTMENTS SHALL BE FINISHED WITH A
NONABSORBENT SURFACE. SUCH WALL SURFACES SHALL EXTEND TO A
HEIGHT OF NOT LESS THAN 6 FEET (1829 MM) ABOVE THE FLOOR.
SECTION R308 GLAZING
R308.4 HAZARDOUS LOCATIONS.
THE LOCATIONS SPECIFIED IN SECTIONS R308.4.1 THROUGH R308.4.7
SHALL BE CONSIDERED TO BE SPECIFIC HAZARDOUS LOCATIONS FOR THE
PURPOSES OF GLAZING.
R308.4.1 GLAZING IN DOORS.
GLAZING IN FIXED AND OPERABLE PANELS OF SWINGING, SLIDING AND
BI-FOLD DOORS SHALL BE CONSIDERED TO BE A HAZARDOUS LOCATION.
NOTE:SEE SECTION 308.4.1 FOR EXCEPTIONS
R308.4.2 GLAZING ADJACENT TO DOORS.
GLAZING IN AN INDIVIDUAL FIXED OR OPERABLE PANEL ADJACENT TO A
DOOR SHALL BE CONSIDERED TO BE A HAZARDOUS LOCATION WHERE
THE BOTTOM EXPOSED EDGE OF THE GLAZING IS LESS THAN 60 INCHES
(1524 MM) ABOVE THE FLOOR OR WALKING SURFACE AND IT MEETS
EITHER OF THE FOLLOWING CONDITIONS:
1.WHERE THE GLAZING IS WITHIN 24 INCHES (610 MM) OF EITHER SIDE
OF THE DOOR IN THE PLANE OF THE DOOR IN A CLOSED POSITION.
2.WHERE THE GLAZING IS ON A WALL LESS THAN 180 DEGREES (3.14
RAD) FROM THE PLANE OF THE DOOR IN A CLOSED POSITION AND WITHIN
24 INCHES (610 MM) OF THE HINGE SIDE OF AN IN-SWINGING DOOR.
EXCEPTIONS:
1.DECORATIVE GLAZING.
2.WHERE THERE IS AN INTERVENING WALL OR OTHER PERMANENT
BARRIER BETWEEN THE DOOR AND THE GLAZING.
3.WHERE ACCESS THROUGH THE DOOR IS TO A CLOSET OR STORAGE
AREA 3 FEET (914 MM) OR LESS IN DEPTH. GLAZING IN THIS APPLICATION
SHALL COMPLY WITH SECTION R308.4.3.
4.GLAZING THAT IS ADJACENT TO THE FIXED PANEL OF PATIO DOORS.
R308.4.3 GLAZING IN WINDOWS.
GLAZING IN AN INDIVIDUAL FIXED OR OPERABLE PANEL THAT MEETS ALL
OF THE FOLLOWING CONDITIONS SHALL BE CONSIDERED TO BE A
HAZARDOUS LOCATION:
1.THE EXPOSED AREA OF AN INDIVIDUAL PANE IS LARGER THAN 9
SQUARE FEET (0.836 M2).
2.THE BOTTOM EDGE OF THE GLAZING IS LESS THAN 18 INCHES (457
MM) ABOVE THE FLOOR.
3.THE TOP EDGE OF THE GLAZING IS MORE THAN 36 INCHES
4.(914 MM) ABOVE THE FLOOR.
5.ONE OR MORE WALKING SURFACES ARE WITHIN 36 INCHES
(914 MM), MEASURED HORIZONTALLY AND IN A STRAIGHT LINE, OF THE
GLAZING.
NOTE:SEE SECTION R308.4.3. FOR EXCEPTIONS
R308.4.4 GLAZING IN GUARDS AND RAILINGS.
GLAZING IN GUARDS AND RAILINGS, INCLUDING STRUCTURAL BALUSTER
PANELS AND NONSTRUCTURAL IN-FILL PANELS, REGARDLESS OF AREA OR
HEIGHT ABOVE A WALKING SURFACE SHALL BE CONSIDERED TO BE A
HAZARDOUS LOCATION.
R308.4.4.1 STRUCTURAL GLASS BALUSTER PANELS.
GUARDS WITH STRUCTURAL GLASS BALUSTER PANELS SHALL BE
INSTALLED WITH AN ATTACHED TOP RAIL OR HANDRAIL. THE TOP RAIL OR
HANDRAIL SHALL BE SUPPORTED BY NOT LESS THAN THREE GLASS
BALUSTER PANELS, OR SHALL BE OTHERWISE SUPPORTED TO REMAIN IN
PLACE SHOULD ONE GLASS BALUSTER PANEL FAIL.
NOTE:SEE SECTION 308.4.4.1 FOR EXCEPTIONS.
R308.4.5 GLAZING AND WET SURFACES.
GLAZING IN WALLS, ENCLOSURES OR FENCES CONTAINING OR FACING
HOT TUBS, SPAS, WHIRLPOOLS, SAUNAS, STEAM ROOMS, BATHTUBS,
SHOWERS AND INDOOR OR OUTDOOR SWIMMING POOLS WHERE THE
BOTTOM EXPOSED EDGE OF THE GLAZING IS LESS THAN 60 INCHES (1524
MM) MEASURED VERTICALLY ABOVE ANY STANDING OR WALKING
SURFACE SHALL BE CONSIDERED A HAZARDOUS LOCATION. THIS SHALL
APPLY TO SINGLE GLAZING AND ALL PANES IN MULTIPLE GLAZING.
SEE SECTION 308.4.5 FOR EXCEPTIONS.
R311.3 FLOORS AND LANDINGS AT EXTERIOR DOORS.
THERE SHALL BE A LANDING OR FLOOR ON EACH SIDE OF EACH
EXTERIOR DOOR. THE WIDTH OF EACH LANDING SHALL BE NOT LESS
THAN THE DOOR SERVED.
LANDINGS SHALL HAVE A DIMENSION OF NOT LESS THAN 36
INCHES (914 MM) MEASURED IN THE DIRECTION OF TRAVEL. THE
SLOPE AT EXTERIOR LANDINGS SHALL NOT EXCEED 1/4 UNIT VERTICAL
IN 12 UNITS HORIZONTAL (2 PERCENT).
SEE SECTION 311.3. FOR EXCEPTION
R311.3.1 FLOOR ELEVATIONS AT THE REQUIRED EGRESS DOORS.
LANDINGS OR FINISHED FLOORS AT THE REQUIRED EGRESS DOOR
SHALL BE NOT MORE THAN 11/2 INCHES (38 MM) LOWER THAN THE
TOP OF THE THRESHOLD.
NOTE: SEE SECTION 311.3.1 FOR EXCEPTION
R311.3.2 FLOOR ELEVATIONS AT OTHER EXTERIOR DOORS.
DOORS OTHER THAN THE REQUIRED EGRESS DOOR SHALL BE
PROVIDED WITH LANDINGS OR FLOORS NOT MORE THAN 73/4 INCHES
(196 MM) BELOW THE TOP OF THE THRESHOLD.
NOTE: SEE SECTION 311.3.2. FOR EXCEPTION
R311.3.3 STORM AND SCREEN DOORS.
STORM AND SCREEN DOORS SHALL BE PERMITTED TO SWING OVER
EXTERIOR STAIRS AND LANDINGS.
R311.4 VERTICAL EGRESS.
EGRESS FROM HABITABLE LEVELS INCLUDING HABITABLE ATTIC AND
BASEMENTS THAT ARE NOT PROVIDED WITH AN EGRESS DOOR IN
ACCORDANCE WITH SECTION R311.2 SHALL BE BY A RAMP IN
ACCORDANCE WITH SECTION R311.8 OR A STAIRWAY IN ACCORDANCE
WITH SECTION R311.7.
R311.5 LANDING, DECK, BALCONY AND STAIR CONSTRUCTION, AND
ATTACHMENT
EXTERIOR LANDINGS, DECKS, BALCONIES, STAIRS AND SIMILAR
FACILITIES SHALL BE POSITIVELY ANCHORED TO THE PRIMARY
STRUCTURE TO RESIST BOTH VERTICAL AND LATERAL FORCES OR
SHALL BE DESIGNED TO BE SELF-SUPPORTING. ATTACHMENT SHALL
NOT BE ACCOMPLISHED BY USE OF TOENAILS OR NAILS SUBJECT TO
WITHDRAWAL.
R311.6 HALLWAYS.
THE WIDTH OF A HALLWAY SHALL BE NOT LESS THAN 3 FEET (914 MM).
R311.7 STAIRWAYS.
R311.7.1 WIDTH.
STAIRWAYS SHALL BE NOT LESS THAN 36
INCHES (914 MM) IN CLEAR WIDTH AT ALL POINTS ABOVE THE
PERMITTED HANDRAIL HEIGHT AND BELOW THE REQUIRED HEADROOM
HEIGHT. THE CLEAR WIDTH OF STAIRWAYS AT AND BELOW THE
HANDRAIL HEIGHT, INCLUDING TREADS AND LANDINGS, SHALL BE NOT
LESS THAN 31 1/2 INCHES (787 MM) WHERE A HANDRAIL IS INSTALLED
ON ONE SIDE AND 27 INCHES (698 MM) WHERE HANDRAILS ARE
INSTALLED ON BOTH SIDES.
NOTE: SEE SECTION 311.7. FOR EXCEPTION
R311.7.2 HEADROOM.
THE HEADROOM IN STAIRWAYS SHALL BE NOT LESS THAN 6 FEET 8
INCHES (2032 MM) MEASURED VERTICALLY FROM THE SLOPED LINE
ADJOINING THE TREAD NOSING OR FROM THE FLOOR SURFACE OF THE
LANDING OR PLATFORM ON THAT PORTION OF THE STAIRWAY.
NOTE: SEE SECTION 311.7.2 FOR EXCEPTIONS
R311.7.3 VERTICAL RISE.
A FLIGHT OF STAIRS SHALL NOT HAVE A VERTICAL RISE LARGER THAN
151 INCHES (3835 MM) BETWEEN FLOOR LEVELS OR LANDINGS
R311.7.4 WALK-LINE.
THE WALK-LINE ACROSS WINDER TREADS AND LANDINGS SHALL BE
CONCENTRIC TO THE TURN AND PARALLEL TO THE DIRECTION OF
TRAVEL ENTERING AND EXITING THE TURN. THE WALKLINE SHALL BE
LOCATED 12 INCHES (305 MM) FROM THE INSIDE OF THE TURN. THE
12-INCH (305mm) DIMENSION SHALL BE MEASURED FROM THE WIDEST
POINT OF THE CLEAR STAIR WIDTH AT THE WALKING SURFACE. WHERE
WINDERS ARE ADJACENT WITHIN A FLIGHT, THE POINT OF THE WIDEST
CLEAR STAIR WIDTH OF THE ADJACENT WINDERS SHALL BE USED.
R311.7.5 STAIR TREADS AND RISERS.
STAIR TREADS AND RISERS SHALL MEET THE REQUIREMENTS OF THIS
SECTION. FOR THE PURPOSES OF THIS SECTION, DIMENSIONS AND
DIMENSIONED SURFACES SHALL BE EXCLUSIVE OF CARPETS, RUGS OR
RUNNERS.
R311.7.5.1 RISERS.
THE RISER HEIGHT SHALL BE NOT MORE THAN 73/4 INCHES (196 MM).
THE RISER SHALL BE MEASURED VERTICALLY BETWEEN LEADING
EDGES OF THE ADJACENT TREADS. THE GREATEST RISER HEIGHT
WITHIN ANY FLIGHT OF STAIRS SHALL NOT EXCEED THE SMALLEST BY
MORE THAN 3/8 INCH (9.5 MM). RISERS SHALL BE VERTICAL OR SLOPED
FROM THE UNDERSIDE OF THE NOSING OF THE TREAD ABOVE AT AN
ANGLE NOT MORE THAN 30 DEGREES (0.51 RAD) FROM THE VERTICAL.
AT OPEN RISERS, OPENINGS LOCATED MORE THAN 30
INCHES (762 MM), AS MEASURED VERTICALLY, TO THE FLOOR OR
GRADE BELOW SHALL NOT PERMIT THE PASSAGE OF
4-INCH-DIA (102 MM) SPHERE.
NOTE: SEE SECTION 311.5.1 FOR EXCEPTIONS
R311.7.5.2 TREADS.
THE TREAD DEPTH SHALL BE NOT LESS THAN 10 INCHES (254 MM). THE
TREAD DEPTH SHALL BE MEASURED HORIZONTALLY BETWEEN THE
VERTICAL PLANES OF THE FOREMOST PROJECTION OF ADJACENT
TREADS AND AT A RIGHT ANGLE TO THE TREAD’S LEADING EDGE. THE
GREATEST TREAD DEPTH WITHIN ANY FLIGHT OF STAIRS SHALL NOT
EXCEED THE SMALLEST BY MORE THAN 3/8 INCH (9.5 MM).
R311.7.5.2.1 WINDER TREADS.
WINDER TREADS SHALL HAVE A TREAD DEPTH OF NOT LESS THAN 10
INCHES (254MM) MEASURED BETWEEN THE VERTICAL PLANES OF THE
FOREMOST PROJECTION OF ADJACENT TREADS AT THE
INTERSECTIONS WITH THE WALK-LINE. WINDER TREADS SHALL HAVE A
TREAD DEPTH OF NOT LESS THAN 6 INCHES (152 MM) AT ANY POINT
WITHIN THE CLEAR WIDTH OF THE STAIR. WITHIN ANY FLIGHT OF
STAIRS, THE LARGEST WINDER TREAD DEPTH AT THE WALK-LINE SHALL
NOT EXCEED THE SMALLEST WINDER TREAD BY MORE THAN 3/8 INCH
(9.5 MM). CONSISTENTLY SHAPED WINDERS AT THE WALK-LINE SHALL
BE ALLOWED WITHIN THE SAME FLIGHT OF STAIRS AS RECTANGULAR
TREADS AND SHALL NOT BE REQUIRED TO BE WITHIN 3/8 INCH (9.5 MM)
OF THE RECTANGULAR TREAD DEPTH.
SEE SECTION 311.7.5 .2.1 FOR EXCEPTION
R308.4.6 GLAZING ADJACENT TO STAIRS AND RAMPS.
GLAZING WHERE THE BOTTOM EXPOSED EDGE OF THE GLAZING IS
LESS THAN 36 INCHES (914 MM) ABOVE THE PLANE OF THE
ADJACENT WALKING SURFACE OF STAIRWAYS, LANDINGS
BETWEEN FLIGHTS OF STAIRS AND RAMPS SHALL BE CONSIDERED
TO BE A HAZARDOUS LOCATION.
NOTE:SEE SECTION 308.4.6 FOR EXCEPTIONS.
R308.4.7 GLAZING ADJACENT TO THE BOTTOM STAIR LANDING.
GLAZING ADJACENT TO THE LANDING AT THE BOTTOM OF A
STAIRWAY WHERE THE GLAZING IS LESS THAN 36 INCHES (914 MM)
ABOVE THE LANDING AND WITHIN A 60-INCH (1524 MM)
HORIZONTAL ARC LESS THAN 180 DEGREES FROM THE BOTTOM
TREAD NOSING SHALL BE CONSIDERED TO BE A HAZARDOUS
LOCATION.
SEE SECTION 308.4.7 FOR EXCEPTION
R308.5 SITE-BUILT WINDOWS.
SITE-BUILT WINDOWS SHALL COMPLY
WITH SECTION 2404 OF THE INTERNATIONAL BUILDING CODE.
R308.6 SKYLIGHTS AND SLOPED GLAZING.
SKYLIGHTS AND SLOPED
GLAZING SHALL COMPLY WITH THE FOLLOWING SECTIONS.
R308.6.1 DEFINITIONS. THE FOLLOWING TERMS ARE DEFINED IN
CHAPTER 2:
-SKYLIGHT, UNIT.
-SKYLIGHTS AND SLOPED GLAZING.
-TUBULAR DAYLIGHTING DEVICE (TDD).
SECTION R309 GARAGES AND CARPORTS
R309.1 FLOOR SURFACE.
GARAGE FLOOR SURFACES SHALL BE OF
APPROVED NONCOMBUSTIBLE MATERIAL. THE AREA OF FLOOR
USED FOR PARKING OF AUTOMOBILES OR OTHER VEHICLES SHALL
BE SLOPED TO FACILITATE THE MOVEMENT OF LIQUIDS TO A DRAIN
OR TOWARD THE MAIN VEHICLE ENTRY DOORWAY.
R309.2 CARPORTS.
CARPORTS SHALL BE OPEN ON NOT LESS THAN TWO SIDES.
CARPORT FLOOR SURFACES SHALL BE OF APPROVED
NONCOMBUSTIBLE MATERIAL. CARPORTS NOT OPEN ON TWO OR
MORE SIDES SHALL BE CONSIDERED TO BE A GARAGE AND SHALL
COMPLY WITH THE PROVISIONS OF THIS SECTION FOR GARAGES.
THE AREA OF FLOOR USED FOR PARKING OF AUTOMOBILES OR
OTHER VEHICLES SHALL BE SLOPED TO FACILITATE THE
MOVEMENT OF LIQUIDS TO A DRAIN OR TOWARD THE MAIN
VEHICLE ENTRY DOORWAY.
EXCEPTION: ASPHALT SURFACES SHALL BE PERMITTED AT
GROUND LEVEL IN CARPORTS.
R309.4 AUTOMATIC GARAGE DOOR OPENERS.
AUTOMATIC GARAGE DOOR OPENERS, IF PROVIDED, SHALL BE
LISTED AND LABELED IN ACCORDANCE WITH UL 325.
R309.5 FIRE SPRINKLERS.
PRIVATE GARAGES SHALL BE PROTECTED BY FIRE SPRINKLERS
WHERE THE GARAGE WALL HAS BEEN DESIGNED BASED ON TABLE
R302.1(2), NOTE A. SPRINKLERS IN GARAGES SHALL BE
CONNECTED TO AN AUTOMATIC SPRINKLER SYSTEM THAT
COMPLIES WITH SECTION P2904. GARAGE SPRINKLERS SHALL BE
RESIDENTIAL SPRINKLERS OR QUICK-RESPONSE SPRINKLERS,
DESIGNED TO PROVIDE A DENSITY OF 0.05 GPM/FT2. GARAGE
DOORS SHALL NOT BE CONSIDERED OBSTRUCTIONS WITH
RESPECT TO SPRINKLER PLACEMENT.
SECTION R310 EMERGENCY ESCAPE AND
RESCUE OPENINGS
R310.1 EMERGENCY ESCAPE AND RESCUE OPENING REQUIRED.
BASEMENTS, HABITABLE ATTICS AND EVERY SLEEPING ROOM
SHALL HAVE NOT LESS THAN ONE OPERABLE EMERGENCY ESCAPE
AND RESCUE OPENING. WHERE BASEMENTS CONTAIN ONE OR
MORE SLEEPING ROOMS, AN EMERGENCY ESCAPE AND RESCUE
OPENING SHALL BE REQUIRED IN EACH SLEEPING ROOM.
EMERGENCY ESCAPE AND RESCUE OPENINGS SHALL OPEN
DIRECTLY INTO A PUBLIC WAY, OR TO A YARD OR COURT THAT
OPENS TO A PUBLIC WAY.
NOTE:SEE SECTION R310.1 FOR EXCEPTION
R310.1.1 OPERATIONAL CONSTRAINTS AND OPENING CONTROL
DEVICES.
EMERGENCY ESCAPE AND RESCUE OPENINGS SHALL BE
OPERATIONAL FROM THE INSIDE OF THE ROOM WITHOUT THE USE
OF KEYS, TOOLS OR SPECIAL KNOWLEDGE. WINDOW OPENING
CONTROL DEVICES ON WINDOWS SERVING AS A REQUIRED
EMERGENCY ESCAPE AND RESCUE OPENING SHALL COMPLY WITH
ASTM F2090.
R310.2 EMERGENCY ESCAPE AND RESCUE OPENINGS.
EMERGENCY ESCAPE AND RESCUE OPENINGS SHALL HAVE
MINIMUM DIMENSIONS AS SPECIFIED IN THIS SECTION.
R310.2.1 MINIMUM OPENING AREA.
EMERGENCY AND ESCAPE RESCUE OPENINGS SHALL HAVE A NET
CLEAR OPENING OF NOT LESS THAN 5.7 SQUARE FEET (0.530 M2).
THE NET CLEAR OPENING DIMENSIONS REQUIRED BY THIS
SECTION SHALL BE OBTAINED BY THE NORMAL OPERATION OF THE
EMERGENCY ESCAPE AND RESCUE OPENING FROM THE INSIDE.
THE NET CLEAR HEIGHT OF THE OPENING SHALL BE NOT LESS
THAN 24 INCHES (610 MM) AND THE NET CLEAR WIDTH SHALL BE
NOT LESS THAN 20 INCHES (508 MM).
EXCEPTION: GRADE FLOOR OPENINGS OR BELOW-GRADE
OPENINGS SHALL
HAVE A NET CLEAR OPENING AREA OF NOT LESS THAN 5 SQUARE
FEET (0.465 M2).
R310.2.2 WINDOW SILL HEIGHT.
WHERE A WINDOW IS PROVIDED AS THE EMERGENCY ESCAPE AND
RESCUE OPENING, IT SHALL HAVE A SILL HEIGHT OF NOT MORE
THAN 44 INCHES (1118 MM) ABOVE THE FLOOR; WHERE THE SILL
HEIGHT IS BELOW GRADE, IT SHALL BE PROVIDED WITH A WINDOW
WELL IN ACCORDANCE WITH SECTION R310.2.3.
R310.2.3 WINDOW WELLS.
THE HORIZONTAL AREA OF THE WINDOW WELL SHALL BE NOT
LESS THAN 9 SQUARE FEET (0.9 M2), WITH A HORIZONTAL
PROJECTION AND WIDTH OF NOT LESS THAN 36 INCHES (914 MM).
THE AREA OF THE WINDOW WELL SHALL ALLOW THE EMERGENCY
ESCAPE AND RESCUE OPENING TO BE FULLY OPENED.
SEE SECTION 310.2.3 FOR EXCEPTION
R310.2.3.1 LADDER AND STEPS.
WINDOW WELLS WITH A VERTICAL DEPTH GREATER THAN 44 INCHES (1118
MM) SHALL BE EQUIPPED WITH A PERMANENTLY AFFIXED LADDER OR
STEPS USABLE WITH THE WINDOW IN THE FULLY OPEN POSITION. LADDERS
OR STEPS REQUIRED BY THIS SECTION SHALL NOT BE REQUIRED TO
COMPLY WITH SECTIONS R311.7. LADDERS OR RUNGS SHALL HAVE AN
INSIDE WIDTH OF NOT LESS THAN 12 INCHES (305 MM), SHALL PROJECT
NOT LESS THAN 3 INCHES (76 MM) FROM THE WALL AND SHALL BE SPACED
NOT MORE THAN 18 INCHES (457 MM) ON CENTER VERTICALLY FOR THE
FULL HEIGHT OF THE WINDOW WELL.
R310.2.3.2 DRAINAGE.
WINDOW WELLS SHALL BE DESIGNED FOR PROPER DRAINAGE BY
CONNECTING TO THE BUILDING’S FOUNDATION DRAINAGE SYSTEM
REQUIRED BY SECTION R405.1 OR BY AN APPROVED ALTERNATIVE
METHOD.
NOTE:SEE SECTION 310.2.3.2 FOR EXCEPTION
R310.2.4 EMERGENCY ESCAPE AND RESCUE OPENINGS UNDER
DECKS AND PORCHES.
EMERGENCY ESCAPE AND RESCUE OPENINGS INSTALLED UNDER DECKS
AND PORCHES SHALL BE FULLY OPENABLE AND PROVIDE A PATH NOT LESS
THAN 36 INCHES (914 MM) IN HEIGHT TO A YARD OR COURT.
R310.2.5 REPLACEMENT WINDOWS.
REPLACEMENT WINDOWS INSTALLED IN BUILDINGS MEETING THE SCOPE
OF THIS CODE SHALL BE EXEMPT FROM THE MAXIMUM SILL HEIGHT
REQUIREMENTS OF SECTION R310.2.2 AND THE REQUIREMENTS OF
SECTION R310.2.1, PROVIDED THAT THE REPLACEMENT WINDOW MEETS
THE FOLLOWING CONDITIONS:
1.THE REPLACEMENT WINDOW IS THE MANUFACTURER'S LARGEST
STANDARD SIZE WINDOW THAT WILL FIT WITHIN THE EXISTING FRAME OR
EXISTING ROUGH OPENING. THE REPLACEMENT WINDOW IS OF THE SAME
OPERATING STYLE AS THE EXISTING WINDOW OR A STYLE THAT PROVIDES
FOR AN EQUAL OR GREATER WINDOW OPENING AREA THAN THE EXISTING
WINDOW.
2.THE REPLACEMENT WINDOW IS NOT PART OF A CHANGE OF
OCCUPANCY.
R310.3 EMERGENCY ESCAPE AND RESCUE DOORS.
WHERE A DOOR IS PROVIDED AS THE REQUIRED EMERGENCY ESCAPE AND
RESCUE OPENING, IT SHALL BE A SIDE-HINGED DOOR OR A SLIDER WHERE
THE OPENING IS BELOW THE ADJACENT GRADE, IT SHALL BE PROVIDED
WITH AN AREA WELL.
R310.3.1 MINIMUM DOOR OPENING SIZE.
THE MINIMUM NET CLEAR HEIGHT OPENING FOR ANY DOOR THAT SERVES
AS AN EMERGENCY AND ESCAPE RESCUE OPENING SHALL BE IN
ACCORDANCE WITH SECTION R310.2.1.
R310.3.2 AREA WELLS.
AREA WELLS SHALL HAVE A WIDTH OF NOT LESS THAN 36 INCHES (914 MM).
THE AREA WELL SHALL BE SIZED TO ALLOW THE EMERGENCY ESCAPE AND
RESCUE DOOR TO BE FULLY OPENED.
R310.3.2.1 LADDER AND STEPS.
AREA WELLS WITH A VERTICAL DEPTH GREATER THAN 44 INCHES (1118 MM)
SHALL BE EQUIPPED WITH A PERMANENTLY AFFIXED LADDER OR STEPS
USABLE WITH THE DOOR IN THE FULLY OPEN POSITION. LADDERS OR
STEPS REQUIRED BY THIS SECTION SHALL NOT BE REQUIRED TO COMPLY
WITH SECTION R311.7. LADDERS OR RUNGS SHALL HAVE AN INSIDE WIDTH
OF NOT LESS THAN 12 INCHES (305 MM), SHALL PROJECT NOT LESS THAN 3
INCHES (76 MM) FROM THE WALL AND SHALL BE SPACED NOT MORE THAN
18 INCHES (457 MM) ON CENTER VERTICALLY FOR THE FULL HEIGHT OF THE
EXTERIOR STAIRWELL.
R310.3.2.2 DRAINAGE.
AREA WELLS SHALL BE DESIGNED FOR PROPER DRAINAGE BY
CONNECTING TO THE BUILDING’S FOUNDATION DRAINAGE SYSTEM
REQUIRED BY SECTION R405.1 OR BY AN APPROVED ALTERNATIVE
METHOD.
NOTE: SEE SECTION 310.3.2.1 FOR EXCEPTION
R310.4 BARS, GRILLES, COVERS AND SCREENS.
WHERE BARS, GRILLES, COVERS, SCREENS OR SIMILAR DEVICES ARE
PLACED OVER EMERGENCY ESCAPE AND RESCUE OPENINGS, AREA
WELLS, OR WINDOW WELLS, THE MINIMUM NET CLEAR OPENING SIZE
SHALL COMPLY WITH SECTIONS R310.2.1 THROUGH R310.2.3, AND SUCH
DEVICES SHALL BE RELEASABLE OR REMOVABLE FROM THE INSIDE
WITHOUT THE USE OF A KEY, TOOL, SPECIAL KNOWLEDGE OR FORCE
GREATER THAN THAT REQUIRED FOR THE NORMAL OPERATION OF THE
ESCAPE AND RESCUE OPENING.
R310.5 DWELLING ADDITIONS.
WHERE DWELLING ADDITIONS CONTAIN SLEEPING ROOMS, AN
EMERGENCY ESCAPE AND RESCUE OPENING SHALL BE PROVIDED IN EACH
NEW SLEEPING ROOM. WHERE DWELLING ADDITIONS HAVE BASEMENTS,
AN EMERGENCY ESCAPE AND RESCUE OPENING SHALL BE PROVIDED IN
THE NEW BASEMENT.
NOTE: SEE SECTION 310.5 FOR EXCEPTIONS
R310.6 ALTERATIONS OR REPAIRS OF EXISTING BASEMENTS.
AN EMERGENCY ESCAPE AND RESCUE OPENING IS NOT REQUIRED WHERE
EXISTING BASEMENTS UNDERGO ALTERATIONS OR REPAIRS.
NOTE: SEE SECTION 310.6 FOR EXCEPTION
SECTION R311 MEANS OF EGRESS
R311.1 MEANS OF EGRESS.
DWELLINGS SHALL BE PROVIDED WITH A MEANS OF EGRESS IN
ACCORDANCE WITH THIS SECTION. THE MEANS OF EGRESS SHALL
PROVIDE A CONTINUOUS AND UNOBSTRUCTED PATH OF VERTICAL AND
HORIZONTAL EGRESS TRAVEL FROM ALL PORTIONS OF THE DWELLING TO
THE REQUIRED EGRESS DOOR WITHOUT REQUIRING TRAVEL THROUGH A
GARAGE. THE REQUIRED EGRESS DOOR SHALL OPEN DIRECTLY INTO A
PUBLIC WAY OR TO A YARD OR COURT THAT OPENS TO A PUBLIC WAY.
R311.2 EGRESS DOOR.
NOT LESS THAN ONE EGRESS DOOR SHALL BE PROVIDED FOR EACH
DWELLING UNIT. THE EGRESS DOOR SHALL BE SIDE-HINGED, AND SHALL
PROVIDE A CLEAR WIDTH OF NOT LESS THAN 32 INCHES (813 MM) WHERE
MEASURED BETWEEN THE FACE OF THE DOOR AND THE STOP, WITH THE
DOOR OPEN 90 DEGREES (1.57 RAD). THE CLEAR HEIGHT OF THE DOOR
OPENING SHALL BE NOT LESS THAN 78 INCHES (1981 MM) IN HEIGHT
MEASURED FROM THE TOP OF THE THRESHOLD TO THE BOTTOM OF THE
STOP. OTHER DOORS SHALL NOT BE REQUIRED TO COMPLY WITH THESE
MINIMUM DIMENSIONS. EGRESS DOORS SHALL BE READILY OPEN-ABLE
FROM INSIDE THE DWELLING WITHOUT THE USE OF A KEY OR SPECIAL
KNOWLEDGE OR EFFORT.
R311.7.5.3 NOSINGS.
NOSINGS AT TREADS, LANDINGS AND FLOORS OF STAIRWAYS SHALL HAVE
A RADIUS OF CURVATURE AT THE NOSING NOT GREATER THAN 9/16 INCH
(14 MM) OR A BEVEL NOT GREATER THAN 1/4 INCH (12.7 MM). A NOSING
PROJECTION NOT LESS THAN 3/4 INCH (19 MM) AND NOT MORE THAN 11/4
INCHES (32 MM) SHALL BE PROVIDED ON STAIRWAYS. THE GREATEST
NOSING PROJECTION SHALL NOT EXCEED THE SMALLEST NOSING
PROJECTION BY MORE THAN 3/8 INCH (9.5 MM) WITHIN A STAIRWAY.
NOTE:SEE SECTION 311.7.5.3 FOR EXCEPTION
.
R311.7.5.4 EXTERIOR PLASTIC COMPOSITE STAIR TREADS.
PLASTIC COMPOSITE EXTERIOR STAIR TREADS SHALL COMPLY
WITH THE PROVISIONS OF THIS SECTION AND SECTION R507.2.2
R311.7.6 LANDINGS FOR STAIRWAYS.
THERE SHALL BE A FLOOR OR LANDING AT THE TOP AND BOTTOM OF EACH
STAIRWAY. THE WIDTH PERPENDICULAR TO THE DIRECTION OF TRAVEL
SHALL BE NOT LESS THAN THE WIDTH OF THE FLIGHT SERVED. FOR
LANDINGS OF SHAPES OTHER THAN SQUARE OR RECTANGULAR, THE
DEPTH AT THE WALK LINE AND THE TOTAL AREA SHALL BE NOT LESS THAN
THAT OF A QUARTER CIRCLE WITH A RADIUS EQUAL TO THE REQUIRED
LANDING WIDTH. WHERE THE STAIRWAY HAS A STRAIGHT RUN, THE DEPTH
IN THE DIRECTION OF TRAVEL SHALL BE NOT LESS THAN 36 INCHES (914
MM).
NOTE:SEE SECTION 311.7.6 FOR EXCEPTION
R311.7.7 STAIRWAY WALKING SURFACE.
THE WALKING SURFACE OF TREADS AND LANDINGS OF STAIRWAYS SHALL
BE SLOPED NOT STEEPER THAN ONE UNIT VERTICAL IN 48 INCHES
HORIZONTAL (2-PERCENT SLOPE).
R311.7.8 HANDRAILS.
HANDRAILS SHALL BE PROVIDED ON NOT LESS THAN ONE SIDE OF EACH
FLIGHT OF STAIRS WITH FOUR OR MORE RISERS.
R311.7.8.1 HEIGHT.
HANDRAIL HEIGHT, MEASURED VERTICALLY FROM THE SLOPED PLANE
ADJOINING THE TREAD NOSING, OR FINISH SURFACE OF RAMP SLOPE,
SHALL BE NOT LESS THAN 34 INCHES (864 MM) AND NOT MORE THAN 38
INCHES (965 MM).
NOTE: SEE SECTION 311.7.8.1 FOR EXCEPTIONS
R311.7.8.2 HANDRAIL PROJECTION.
HANDRAILS SHALL NOT PROJECT MORE THAN 4 1/2 INCHES (114 MM) ON
EITHER SIDE OF THE STAIRWAY.
NOTE: SEE SECTION 311.7.8.2 FOR EXCEPTIONS
R311.7.8.3 HANDRAIL CLEARANCE.
HANDRAILS ADJACENT TO A WALL SHALL HAVE A SPACE OF NOT LESS
THAN 1 1/2 INCHES (38 MM) BETWEEN THE WALL AND THE HANDRAILS.
R311.7.8.4 CONTINUITY.
HANDRAILS SHALL BE CONTINUOUS FOR THE FULL LENGTH OF THE FLIGHT,
FROM A POINT DIRECTLY ABOVE THE TOP RISER OF THE FLIGHT TO A
POINT DIRECTLY ABOVE THE LOWEST RISER OF THE FLIGHT. HANDRAIL
ENDS SHALL BE RETURNED OR SHALL TERMINATE IN NEWEL POSTS OR
SAFETY TERMINALS
NOTE: SEE SECTION 311.7.8.4 FOR EXCEPTIONS
R311.7.8.5 GRIP-SIZE.
REQUIRED HANDRAILS SHALL BE OF ONE OF THE FOLLOWING TYPES OR
PROVIDE EQUIVALENT GRASPABILITY.
NOTE: SEE R3117.8.3 FOR TYPE I AND TYPE II HANDRAILS.
R311.7.8.6 EXTERIOR PLASTIC COMPOSITE HANDRAILS.
PLASTIC COMPOSITE EXTERIOR HANDRAILS SHALL COMPLY WITH THE
REQUIREMENTS OF SECTION R507.2.2.
R311.7.9 ILLUMINATION.
STAIRWAYS SHALL BE PROVIDED WITH ILLUMINATION IN ACCORDANCE
WITH SECTION R303.7 AND R303.8.
R311.7.10 SPECIAL STAIRWAYS.
SPIRAL STAIRWAYS AND BULKHEAD ENCLOSURE STAIRWAYS SHALL
COMPLY WITH THE REQUIREMENTS OF SECTION R311.7 EXCEPT AS
SPECIFIED IN SECTIONS R311.7.10.1 AND R311.7.10.2.
R311.7.10.1 SPIRAL STAIRWAYS.
THE CLEAR WIDTH AT AND BELOW THE HANDRAILS AT SPIRAL STAIRWAYS
SHALL BE NOT LESS THAN 26 INCHES (660 MM) AND THE WALK-LINE RADIUS
SHALL BE NOT GREATER THAN 24 1/2 INCHES (622 MM). EACH TREAD SHALL
HAVE A DEPTH OF NOT LESS THAN 6 3/4 INCHES (171 MM) AT THE
WALK-LINE. TREADS SHALL BE IDENTICAL, AND THE RISE SHALL BE NOT
MORE THAN 9 1/2 INCHES (241 MM). HEADROOM SHALL BE NOT LESS THAN
6 FEET 6 INCHES (1982 MM).
R311.7.10.2 BULKHEAD ENCLOSURE STAIRWAYS.
STAIRWAYS SERVING BULKHEAD ENCLOSURES, NOT PART OF THE
REQUIRED BUILDING EGRESS, PROVIDING ACCESS FROM THE OUTSIDE
GRADE LEVEL TO THE BASEMENT SHALL BE EXEMPT FROM THE
REQUIREMENTS OF SECTIONS R311.3 AND R311.7 WHERE THE HEIGHT
FROM THE BASEMENT FINISHED FLOOR LEVEL TO GRADE ADJACENT TO
THE STAIRWAY IS NOT MORE THAN 8 FEET (2438 MM) AND THE GRADE
LEVEL OPENING TO THE STAIRWAY IS COVERED BY A BULKHEAD
ENCLOSURE WITH HINGED DOORS OR OTHER APPROVED MEANS.
NOTE: SEE SECTION R311.7.11 THROUGH R311.7.12.2 FOR
ALTERNATING TREAD DEVICES AND SHIPS LADDERS.
R311.8 RAMPS
R311.8.1 MAXIMUM SLOPE.
RAMPS SERVING THE EGRESS DOOR REQUIRED BY SECTION R311.2 SHALL
HAVE A SLOPE OF NOT MORE THAN 1 UNIT VERTICAL IN 12 UNITS
HORIZONTAL (8.3-PERCENT SLOPE). OTHER RAMPS SHALL HAVE A
MAXIMUM SLOPE OF 1 UNIT VERTICAL IN 8 UNITS HORIZONTAL (12.5
PERCENT).
EXCEPTION: WHERE IT IS TECHNICALLY INFEASIBLE TO COMPLY
BECAUSE OF SITE CONSTRAINTS, RAMPS SHALL HAVE A SLOPE OF
NOT MORE THAN 1 UNIT VERTICAL IN 8 UNITS HORIZONTAL (12.5
PERCENT).
R311.8.2 LANDINGS REQUIRED.
THERE SHALL BE A FLOOR OR LANDING AT THE TOP AND BOTTOM OF EACH
RAMP, WHERE DOORS OPEN ONTO RAMPS, AND WHERE RAMPS CHANGE
DIRECTIONS. THE WIDTH OF THE LANDING PERPENDICULAR TO THE RAMP
SLOPE SHALL BE NOT LESS THAN 36 INCHES (914 MM).
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R314.3 LOCATION.
SMOKE ALARMS SHALL BE INSTALLED IN THE FOLLOWING LOCATIONS:
1.IN EACH SLEEPING ROOM.
2.OUTSIDE EACH SEPARATE SLEEPING AREA IN THE IMMEDIATE VICINITY
OF THE BEDROOMS.
3.ON EACH ADDITIONAL STORY OF THE DWELLING, INCLUDING
BASEMENTS AND HABITABLE ATTICS AND NOT INCLUDING CRAWL
SPACES AND UNINHABITABLE ATTICS. IN DWELLINGS OR DWELLING
UNITS WITH SPLIT LEVELS AND WITHOUT AN INTERVENING DOOR BETWEEN
THE ADJACENT LEVELS, A SMOKE ALARM INSTALLED ON THE UPPER LEVEL
SHALL SUFFICE FOR THE ADJACENT LOWER LEVEL PROVIDED THAT THE
LOWER LEVEL IS LESS THAN ONE FULL STORY BELOW THE UPPER LEVEL.
4.SMOKE ALARMS SHALL BE INSTALLED NOT LESS THAN 3 FEET
(914 MM) HORIZONTALLY FROM THE DOOR OR OPENING OF A BATHROOM
THAT CONTAINS A BATHTUB OR SHOWER UNLESS THIS
WOULD PREVENT PLACEMENT OF A SMOKE ALARM REQUIRED BY
THIS SECTION.
R314.3.1 INSTALLATION NEAR COOKING APPLIANCES.
SMOKE ALARMS SHALL NOT BE INSTALLED IN THE FOLLOWING LOCATIONS
UNLESS THIS WOULD PREVENT PLACEMENT OF A SMOKE ALARM IN A
LOCATION REQUIRED BY SECTION R314.3.
1.IONIZATION SMOKE ALARMS SHALL NOT BE INSTALLED LESS
THAN 20 FEET (6096 MM) HORIZONTALLY FROM A PERMANENTLY
INSTALLED COOKING APPLIANCE.
2.IONIZATION SMOKE ALARMS WITH AN ALARM-SILENCING SWITCH SHALL
NOT BE INSTALLED LESS THAN 10 FEET (3048 mm) HORIZONTALLY FROM A
PERMANENTLY INSTALLED COOKING
APPLIANCE.
3.PHOTOELECTRIC SMOKE ALARMS SHALL NOT BE INSTALLED
LESS THAN 6 FEET (1828 MM) HORIZONTALLY FROM A PERMANENTLY
INSTALLED COOKING APPLIANCE.
R314.4 INTERCONNECTION.
WHERE MORE THAN ONE SMOKE ALARM
IS REQUIRED TO BE INSTALLED WITHIN AN INDIVIDUAL DWELLING UNIT IN
ACCORDANCE WITH SECTION R314.3, THE ALARM DEVICES SHALL BE
INTERCONNECTED IN SUCH A MANNER THAT THE ACTUATION OF ONE ALARM
WILL ACTIVATE ALL OF THE ALARMS IN THE INDIVIDUAL DWELLING UNIT.
PHYSICAL INTERCONNECTION OF SMOKE ALARMS SHALL NOT BE REQUIRED
WHERE LISTED WIRELESS ALARMS ARE INSTALLED AND ALL ALARMS SOUND
UPON ACTIVATION OF ONE ALARM.
R314.5 COMBINATION ALARMS.
COMBINATION SMOKE AND CARBON MONOXIDE ALARMS SHALL BE
PERMITTED TO BE USED IN LIEU OF SMOKE ALARMS.
R314.6 POWER SOURCE.
SMOKE ALARMS SHALL RECEIVE THEIR PRIMARY POWER FROM THE
BUILDING WIRING WHERE SUCH WIRING IS SERVED FROM A COMMERCIAL
SOURCE AND, WHERE PRIMARY POWER IS INTERRUPTED, SHALL RECEIVE
POWER FROM A BATTERY. WIRING
SHALL BE PERMANENT AND WITHOUT A DISCONNECTING SWITCH OTHER
THAN THOSE REQUIRED FOR OVERCURRENT PROTECTION.
NOTE:SEE SECTION 314.6 FOR EXCEPTIONS
R314.7 FIRE ALARM SYSTEMS
FIRE ALARM SYSTEMS SHALL BE PERMITTED TO BE USED IN LIEU OF SMOKE
ALARMS AND SHALL COMPLY WITH SECTIONS R314.7.1 THROUGH R314.7.4.
SECTION R315 CARBON MONOXIDE ALARMS
R315.1 GENERAL.
CARBON MONOXIDE ALARMS SHALL COMPLY WITH SECTION R315.
R315.1.1 LISTINGS.
CARBON MONOXIDE ALARMS SHALL BE LISTED IN ACCORDANCE WITH UL
2034. COMBINATION CARBON MONOXIDE AND SMOKE ALARMS SHALL BE
LISTED IN ACCORDANCE WITH UL 2034 AND UL 217.
R315.2 WHERE REQUIRED.
CARBON MONOXIDE ALARMS SHALL BE PROVIDED IN ACCORDANCE WITH
SECTIONS R315.2.1 AND R315.2.2.
R315.2.1 NEW CONSTRUCTION.
FOR NEW CONSTRUCTION, CARBON MONOXIDE ALARMS SHALL BE PROVIDED
IN DWELLING UNITS WHERE EITHER OR BOTH OF THE FOLLOWING
CONDITIONS EXIST.
1.THE DWELLING UNIT CONTAINS A FUEL-FIRED APPLIANCE.
2.THE DWELLING UNIT HAS AN ATTACHED GARAGE WITH AN
OPENING THAT COMMUNICATES WITH THE DWELLING UNIT.
R315.2.2 ALTERATIONS, REPAIRS AND ADDITIONS.
WHERE ALTERATIONS, REPAIRS OR ADDITIONS REQUIRING A PERMIT OCCUR,
THE INDIVIDUAL DWELLING UNIT SHALL BE EQUIPPED WITH CARBON
MONOXIDE ALARMS LOCATED AS REQUIRED FOR NEW DWELLINGS.
EXCEPTIONS:
NOTE:SEE SECTION 315.2.2 FOR EXCEPTIONS
R315.3 LOCATION.
CARBON MONOXIDE ALARMS IN DWELLING UNITS SHALL BE INSTALLED
OUTSIDE OF EACH SEPARATE SLEEPING AREA IN THE IMMEDIATE VICINITY OF
THE BEDROOMS. WHERE A FUEL-BURNING APPLIANCE IS LOCATED WITHIN A
BEDROOM OR ITS ATTACHED BATHROOM, A CARBON MONOXIDE ALARM
SHALL BE INSTALLED WITHIN THE BEDROOM.
R315.4 COMBINATION ALARMS.
COMBINATION CARBON MONOXIDE AND SMOKE ALARMS SHALL BE
PERMITTED TO BE USED IN LIEU OF CARBON MONOXIDE ALARMS.
R315.5 INTERCONNECTIVITY.
WHERE MORE THAN ONE CARBON MONOXIDE ALARM IS REQUIRED TO BE
INSTALLED WITHIN AN INDIVIDUAL DWELLING UNIT IN ACCORDANCE WITH
SECTION R315.3, THE ALARM DEVICES SHALL BE INTERCONNECTED IN SUCH
A MANNER THAT THE ACTUATION OF ONE ALARM WILL ACTIVATE ALL OF THE
ALARMS IN THE INDIVIDUAL DWELLING UNIT. PHYSICAL INTERCONNECTION
OF CARBON MONOXIDE ALARMS SHALL NOT BE REQUIRED WHERE LISTED
WIRELESS ALARMS ARE INSTALLED AND ALL ALARMS SOUND UPON
ACTIVATION OF ONE ALARM.
NOTE:SEE SECTION 315.5 FOR EXCEPTIONS
R315.6 POWER SOURCE.
CARBON MONOXIDE ALARMS SHALL RECEIVE THEIR PRIMARY POWER FROM
THE BUILDING WIRING WHERE SUCH WIRING IS SERVED FROM A
COMMERCIAL SOURCE AND, WHERE PRIMARY POWER IS INTERRUPTED,
SHALL RECEIVE POWER FROM A BATTERY. WIRING SHALL BE PERMANENT
AND WITHOUT A DISCONNECTING SWITCH OTHER THAN THOSE REQUIRED
FOR OVER-CURRENT PROTECTION.
NOTE:SEE SECTION 315.5 FOR EXCEPTIONS
R315.7 CARBON MONOXIDE DETECTION SYSTEMS.
CARBON MONOXIDE DETECTION SYSTEMS SHALL BE PERMITTED TO BE USED
IN LIEU OF CARBON MONOXIDE ALARMS AND SHALL COMPLY WITH SECTIONS
R315.6.1 THROUGH R315.6.4.
R311.8.3 HANDRAILS REQUIRED.
HANDRAILS SHALL BE PROVIDED ON NOT LESS THAN ONE SIDE
OF RAMPS EXCEEDING A SLOPE OF ONE UNIT VERTICAL IN 12
UNITS HORIZONTAL (8.33-PERCENT SLOPE).
R311.8.3.1 HEIGHT.
HANDRAIL HEIGHT, MEASURED ABOVE THE FINISHED SURFACE
OF THE RAMP SLOPE, SHALL BE NOT LESS THAN 34 INCHES (864
MM)AND NOT MORE THAN 38 INCHES (965 MM).
R311.8.3.2 GRIP SIZE.
HANDRAILS ON RAMPS SHALL COMPLY WITH SECTION R311.7.8.5.
R311.8.3.3 CONTINUITY.
HANDRAILS WHERE REQUIRED ON RAMPS SHALL BE
CONTINUOUS FOR THE FULL LENGTH OF THE RAMP. HANDRAIL
ENDS SHALL BE RETURNED OR SHALL TERMINATE IN NEWEL
POSTS OR SAFETY TERMINALS. HANDRAILS ADJACENT TO A
WALL SHALL HAVE A SPACE OF NOT LESS THAN 11/2 INCHES (38
MM) BETWEEN THE WALL AND THE HANDRAILS.
SECTION R312
GUARDS AND WINDOW FALL PROTECTION
R312.1 GUARDS.
GUARDS SHALL BE PROVIDED IN ACCORDANCE WITH SECTIONS
R312.1.1 THROUGH R312.1.4.
R312.1.1 WHERE REQUIRED.
GUARDS SHALL BE PROVIDED FOR THOSE PORTIONS OF
OPEN-SIDED WALKING SURFACES, INCLUDING STAIRS, RAMPS
AND LANDINGS, THAT ARE LOCATED MORE THAN 30 INCHES (762
MM) MEASURED VERTICALLY TO THE FLOOR OR GRADE BELOW
AT ANY POINT WITHIN 36 INCHES (914 MM) HORIZONTALLY TO
THE EDGE OF THE OPEN SIDE. INSECT SCREENING SHALL NOT
BE CONSIDERED AS A GUARD.
R312.1.2 HEIGHT.
REQUIRED GUARDS AT OPEN-SIDED WALKING SURFACES,
INCLUDING STAIRS, PORCHES, BALCONIES OR LANDINGS, SHALL
BE NOT LESS THAN 36 INCHES (914 MM) IN HEIGHT AS MEASURED
VERTICALLY ABOVE THE ADJACENT WALKING SURFACE OR
THE LINE CONNECTING THE NOSINGS.
NOTE: SEE SECTION 312.1.2 FOR EXCEPTIONS
R312.1.3 OPENING LIMITATIONS.
REQUIRED GUARDS SHALL NOT HAVE OPENINGS FROM THE
WALKING SURFACE TO THE REQUIRED GUARD HEIGHT THAT
ALLOW PASSAGE OF A SPHERE 4 INCHES (102 mm) IN DIAMETER.
NOTE: SEE SECTION 312.1.3 FOR EXCEPTIONS
R312.1.4 EXTERIOR PLASTIC COMPOSITE GUARDS.
PLASTIC COMPOSITE EXTERIOR GUARDS SHALL COMPLY WITH
THE
REQUIREMENTS OF SECTION R317.4.
R312.2 WINDOW FALL PROTECTION.
WINDOW FALL PROTECTION SHALL BE PROVIDED IN
ACCORDANCE WITH SECTIONS R312.2.1 AND R312.2.2.
R312.2.1 WINDOW SILLS.
IN DWELLING UNITS, WHERE THE TOP OF THE SILL OF AN
OPERABLE WINDOW OPENING IS LOCATED LESS THAN 24 INCHES
(610 MM) ABOVE THE FINISHED FLOOR AND GREATER THAN 72
INCHES (1829 MM) ABOVE THE FINISHED GRADE OR OTHER
SURFACE BELOW ON THE EXTERIOR OF THE BUILDING, THE
OPERABLE WINDOW SHALL COMPLY WITH ONE OF THE
FOLLOWING:
1.OPERABLE WINDOW OPENINGS WILL NOT ALLOW A
4-INCH-DIAMETER (102 MM) SPHERE TO PASS THROUGH WHERE
THE OPENINGS ARE IN THEIR LARGEST OPENED POSITION.
2.OPERABLE WINDOWS ARE PROVIDED WITH WINDOW FALL
PREVENTION DEVICES THAT COMPLY WITH ASTM F2090.
3.OPERABLE WINDOWS THAT ARE PROVIDED WITH WINDOW
4.OPENING CONTROL DEVICES THAT COMPLY WITH SECTION
R312.2.2.
R312.2.2 WINDOW OPENING CONTROL DEVICES.
WINDOW OPENING CONTROL DEVICES SHALL COMPLY WITH
ASTM F2090. THE WINDOW OPENING CONTROL DEVICE, AFTER
OPERATION TO RELEASE THE CONTROL DEVICE ALLOWING THE
WINDOW TO FULLY OPEN, SHALL NOT REDUCE THE NET CLEAR
OPENING AREA OF THE WINDOW UNIT TO LESS THAN THE AREA
REQUIRED BY SECTION R310.2.1.
SECTION R313
AUTOMATIC FIRE SPRINKLER SYSTEMS
313.1 TOWNHOUSE AUTOMATIC FIRE SPRINKLER SYSTEMS.
AN AUTOMATIC RESIDENTIAL FIRE SPRINKLER SYSTEM SHALL BE
INSTALLED IN TOWNHOUSES.
NOTE:SEE SECTION 313.1 FOR EXCEPTION
R313.1.1 DESIGN AND INSTALLATION.
AUTOMATIC RESIDENTIAL FIRE SPRINKLER SYSTEMS FOR
TOWNHOUSES SHALL BE DESIGNED AND INSTALLED IN
ACCORDANCE WITH SECTION P2904 OR NFPA 13D.
R313.2 ONE- AND TWO-FAMILY DWELLINGS AUTOMATIC FIRE
SPRINKLER SYSTEMS.
AN AUTOMATIC RESIDENTIAL FIRE SPRINKLER SYSTEM SHALL BE
INSTALLED IN ONE- AND TWO-FAMILY DWELLINGS.
NOTE:SEE SECTION 313.2 FOR EXCEPTION
R313.2.1 DESIGN AND INSTALLATION.
AUTOMATIC RESIDENTIAL FIRE SPRINKLER SYSTEMS SHALL BE
DESIGNED AND INSTALLED IN ACCORDANCE WITH SECTION
P2904 OR NFPA 13D.
SECTION R314 SMOKE ALARMS
R314.1 GENERAL.
SMOKE ALARMS SHALL COMPLY WITH NFPA 72 AND SECTION
R314.
R314.1.1 LISTINGS.
SMOKE ALARMS SHALL BE LISTED IN ACCORDANCE WITH UL 217.
COMBINATION SMOKE AND CARBON MONOXIDE ALARMS SHALL
BE LISTED IN ACCORDANCE WITH UL 217 AND UL 2034.
R314.2 WHERE REQUIRED.
SMOKE ALARMS SHALL BE PROVIDED IN ACCORDANCE WITH
THIS SECTION.
R314.2.1 NEW CONSTRUCTION.
SMOKE ALARMS SHALL BE PROVIDED IN DWELLING UNITS.
R314.2.2 ALTERATIONS, REPAIRS AND ADDITIONS.
WHERE ALTERATIONS, REPAIRS OR ADDITIONS REQUIRING A
PERMIT OCCUR, THE INDIVIDUAL DWELLING UNIT SHALL BE
EQUIPPED WITH SMOKE ALARMS LOCATED AS REQUIRED FOR
NEW DWELLINGS.
SEE SECTION 314.2.2 FOR EXCEPTIONS
SECTION R321
ELEVATORS AND PLATFORM LIFTS
R321.1 ELEVATORS.
WHERE PROVIDED, PASSENGER ELEVATORS, LIMITED- USE AND
LIMITED-APPLICATION ELEVATORS OR PRIVATE RESIDENCE ELEVATORS
SHALL COMPLY WITH ASME A17.1/CSA B44.
SECTION R322
FLOOD-RESISTANT CONSTRUCTION
R322.1 GENERAL.
BUILDINGS AND STRUCTURES CONSTRUCTED IN
WHOLE OR IN PART IN FLOOD HAZARD AREAS, INCLUDING A OR V
ZONES AND COASTAL A ZONES, AS ESTABLISHED IN TABLE R301.2(1), AND
SUBSTANTIAL IMPROVEMENT AND REPAIR OF SUBSTANTIAL DAMAGE OF
BUILDINGS AND STRUCTURES IN FLOOD
HAZARD AREAS, SHALL BE DESIGNED AND CONSTRUCTED IN ACCORDANCE
WITH THE PROVISIONS CONTAINED IN THIS SECTION. BUILDINGS AND
STRUCTURES THAT ARE LOCATED IN MORE THAN ONE FLOOD HAZARD
AREA SHALL COMPLY WITH THE PROVISIONS ASSOCIATED WITH THE MOST
RESTRICTIVE FLOOD HAZARD AREA. BUILDINGS AND STRUCTURES
LOCATED IN WHOLE OR IN PART IN IDENTIFIED FLOODWAYS SHALL BE
DESIGNED
AND CONSTRUCTED IN ACCORDANCE WITH ASCE 24.
R322.1.2 STRUCTURAL SYSTEMS.
STRUCTURAL SYSTEMS OF BUILDINGS AND STRUCTURES SHALL BE
DESIGNED, CONNECTED AND ANCHORED TO RESIST FLOTATION,
COLLAPSE OR PERMANENT LATERAL MOVEMENT DUE TO STRUCTURAL
LOADS AND STRESSES FROM FLOODING EQUAL TO THE DESIGN FLOOD
ELEVATION.
R322.1.3 FLOOD-RESISTANT CONSTRUCTION.
BUILDINGS AND STRUCTURES ERECTED IN AREAS PRONE TO FLOODING
SHALL BE CONSTRUCTED BY METHODS AND PRACTICES THAT MINIMIZE
FLOOD DAMAGE.
R322.1.4 ESTABLISHING THE DESIGN FLOOD ELEVATION.
THE DESIGN FLOOD ELEVATION SHALL BE USED TO DEFINE FLOOD HAZARD
AREAS. AT A MINIMUM, THE DESIGN FLOOD ELEVATION SHALL BE THE
HIGHER OF THE FOLLOWING:
1.THE BASE FLOOD ELEVATION AT THE DEPTH OF PEAK ELEVATION OF
FLOODING, INCLUDING WAVE HEIGHT, THAT HAS A 1
PERCENT (100-YEAR FLOOD) OR GREATER CHANCE OF BEING EQUALED OR
EXCEEDED IN ANY GIVEN YEAR.
2.THE ELEVATION OF THE DESIGN FLOOD ASSOCIATED WITH THE AREA
DESIGNATED ON A FLOOD HAZARD MAP ADOPTED BY
THE COMMUNITY, OR OTHERWISE LEGALLY DESIGNATED.
FOR DETERMINING DESIGN FLOOD ELEVATIONS AND IMPACTS REFER TO
SECTIONS R322.1.4.1 AND R322.1.4.2
R322.1.5 LOWEST FLOOR.
THE LOWEST FLOOR SHALL BE THE LOWEST FLOOR OF THE LOWEST
ENCLOSED AREA, INCLUDING BASEMENT, AND EXCLUDING ANY
UNFINISHED FLOOD-RESISTANT ENCLOSURE THAT IS USEABLE SOLELY
FOR VEHICLE PARKING, BUILDING ACCESS OR LIMITED STORAGE
PROVIDED THAT SUCH ENCLOSURE IS NOT BUILT SO AS TO RENDER THE
BUILDING OR STRUCTURE IN VIOLATION OF THIS SECTION.
R322.1.6 PROTECTION OF MECHANICAL, PLUMBING AND ELECTRICAL
SYSTEMS.
ELECTRICAL SYSTEMS, EQUIPMENT AND COMPONENTS; HEATING,
VENTILATING, AIR CONDITIONING; PLUMBING APPLIANCES AND PLUMBING
FIXTURES; DUCT SYSTEMS; AND OTHER SERVICE EQUIPMENT SHALL BE
LOCATED AT OR ABOVE THE ELEVATION REQUIRED IN SECTION R322.2 OR
R322.3. IF REPLACED AS
PART OF A SUBSTANTIAL IMPROVEMENT, ELECTRICAL SYSTEMS,
EQUIPMENT AND COMPONENTS; HEATING, VENTILATING, AIR
CONDITIONING AND PLUMBING APPLIANCES AND PLUMBING FIXTURES;
DUCT SYSTEMS; AND OTHER SERVICE EQUIPMENT SHALL MEET THE
REQUIREMENTS OF THIS SECTION. SYSTEMS, FIXTURES, AND EQUIPMENT
AND COMPONENTS SHALL NOT BE MOUNTED ON OR PENETRATE THROUGH
WALLS INTENDED TO BREAK AWAY UNDER FLOOD LOADS.
NOTE: SEE SECTION 322.1.6 FOR EXCEPTION
R322.1.7 PROTECTION OF WATER SUPPLY AND SANITARY SEWAGE
SYSTEMS.
NEW AND REPLACEMENT WATER SUPPLY SYSTEMS
SHALL BE DESIGNED TO MINIMIZE OR ELIMINATE INFILTRATION OF
FLOOD WATERS INTO THE SYSTEMS IN ACCORDANCE WITH THE
PLUMBING PROVISIONS OF THIS CODE. NEW AND REPLACEMENT
SANITARY SEWAGE SYSTEMS SHALL BE DESIGNED TO MINIMIZE OR
ELIMINATE INFILTRATION OF FLOODWATERS INTO SYSTEMS AND
DISCHARGES FROM SYSTEMS INTO FLOODWATERS IN ACCORDANCE WITH
THE PLUMBING PROVISIONS OF THIS CODE AND CHAPTER 3 OF THE
INTERNATIONAL PRIVATE SEWAGE DISPOSAL CODE.
R322.2.2 ENCLOSED AREA BELOW DESIGN FLOOD ELEVATION.
ENCLOSED AREAS, INCLUDING CRAWL SPACES, THAT ARE BELOW THE
DESIGN FLOOD ELEVATION SHALL:
1.BE USED SOLELY FOR PARKING OF VEHICLES, BUILDING
ACCESS OR STORAGE.
2.BE PROVIDED WITH FLOOD OPENINGS THAT MEET THE FOLLOWING
CRITERIA AND ARE INSTALLED IN ACCORDANCE WITH
SECTION R322.2.2.1 SECTIONS 2.1 THROUGH 2.3,
AS WELL AS, SECTIONS:
-R322.2.2.1 FOR INSTALLATION OF OPENINGS.
-R322.2.3 FOUNDATION DESIGN AND CONSTRUCTION.
-R322.2.4 TANKS.
REFER TO SECTION R322.3 FOR COASTAL HIGH-HAZARD AREAS
(INCLUDING V ZONES AND COASTAL A ZONES, WHERE DESIGNATED).
INCLUDING:
R322.3.1 LOCATION AND SITE PREPARATION
R322.3.2 ELEVATION REQUIREMENTS
R322.3.3 FOUNDATIONS
R322.3.4 CONCRETE SLABS
R322.3.5 WALLS BELOW DESIGN FLOOD ELEVATION
R322.3.6 ENCLOSED AREAS BELOW DESIGN FLOOD ELEVATION.
R322.3.7 STAIRWAYS AND RAMPS
R322.3.8 DECKS AND PORCHES
R322.3.9 CONSTRUCTION DOCUMENTS
R322.3.10 TANKS
SECTION R323 STORM SHELTERS
R323.1 GENERAL.
THIS SECTION APPLIES TO STORM SHELTERS WHERE CONSTRUCTED AS
SEPARATE DETACHED BUILDINGS OR WHERE CONSTRUCTED AS SAFE
ROOMS WITHIN BUILDINGS FOR THE PURPOSE OF PROVIDING REFUGE
FROM STORMS THAT PRODUCE HIGH WINDS, SUCH AS TORNADOS AND
HURRICANES. IN ADDITION TO OTHER APPLICABLE REQUIREMENTS IN THIS
CODE, STORM SHELTERS SHALL BE CONSTRUCTED IN ACCORDANCE WITH
ICC/NSSA-500.
SECTION R326
SWIMMING POOLS, SPAS AND HOT TUBS
R326.1 GENERAL.
THE DESIGN AND CONSTRUCTION OF POOLS AND SPAS SHALL COMPLY
R404.4 RETAINING WALLS.
RETAINING WALLS THAT ARE NOT LATERALLY SUPPORTED AT THE TOP
AND THAT RETAIN IN EXCESS OF 48 INCHES (1219 MM) OF UNBALANCED
FILL, OR RETAINING WALLS EXCEEDING 24 INCHES (610 MM) IN HEIGHT
THAT RESIST LATERAL LOADS IN ADDITION TO SOIL, SHALL BE
DESIGNED IN ACCORDANCE WITH ACCEPTED ENGINEERING PRACTICE
TO ENSURE STABILITY AGAINST OVERTURNING, SLIDING, EXCESSIVE
FOUNDATION PRESSURE AND WATER UPLIFT. RETAINING WALLS SHALL
BE DESIGNED FOR A SAFETY FACTOR OF 1.5 AGAINST LATERAL SLIDING
AND OVERTURNING. THIS SECTION SHALL NOT APPLY TO FOUNDATION
WALLS SUPPORTING BUILDINGS.
R404.5 PRECAST CONCRETE FOUNDATION WALLS.
REFER TO SECTION 404.5 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR PRECAST CONCRETE FOUNDATION WALLS.
SECTION R405 FOUNDATION DRAINAGE
R405.1 CONCRETE OR MASONRY FOUNDATIONS.
DRAINS SHALL BE PROVIDED AROUND CONCRETE OR MASONRY
FOUNDATIONS THAT RETAIN EARTH AND ENCLOSE HABITABLE OR
USABLE SPACES LOCATED BELOW GRADE. DRAINAGE TILES, GRAVEL
OR CRUSHED STONE DRAINS, PERFORATED PIPE OR OTHER
APPROVED SYSTEMS OR MATERIALS SHALL BE INSTALLED AT OR
BELOW THE TOP OF THE FOOTING OR BELOW THE BOTTOM OF THE
SLAB AND SHALL DISCHARGE BY GRAVITY OR MECHANICAL MEANS
INTO AN APPROVED DRAINAGE SYSTEM. GRAVEL OR CRUSHED STONE
DRAINS SHALL EXTEND NOT LESS THAN 1 FOOT (305 MM) BEYOND THE
OUTSIDE EDGE OF THE FOOTING AND 6 INCHES (152 MM) ABOVE THE
TOP OF THE FOOTING AND BE COVERED WITH AN APPROVED FILTER
MEMBRANE MATERIAL. THE TOP OF OPEN JOINTS OF DRAIN TILES
SHALL BE PROTECTED WITH STRIPS OF BUILDING PAPER. EXCEPT
WHERE OTHERWISE RECOMMENDED BY THE DRAIN MANUFACTURER,
PERFORATED DRAINS SHALL BE SURROUNDED WITH AN APPROVED
FILTER MEMBRANE OR THE FILTER MEMBRANE SHALL COVER THE
WASHED GRAVEL OR CRUSHED ROCK COVERING THE DRAIN.
DRAINAGE TILES OR PERFORATED PIPE SHALL BE PLACED ON NOT
LESS THAN 2 INCHES (51 MM) OF WASHED GRAVEL OR CRUSHED ROCK
NOT LESS THAN ONE SIEVE SIZE LARGER THAN THE TILE JOINT
OPENING OR PERFORATION AND COVERED WITH NOT LESS THAN 6
INCHES (152 MM) OF THE SAME MATERIAL.
REFER TO SECTION 405 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR PRECAST CONCRETE FOUNDATION WALLS.
SECTION R406
FOUNDATION WATER-PROOFING AND
DAMP-PROOFING
REFER TO SECTION 406 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR WATER-PROOFING AND DAMP-PROOFING
FOUNDATIONS INCLUDING THE FOLLOWING AREAS:
-R406.1 CONCRETE AND MASONRY FOUNDATION DAMPPROOFING.
-R406.2 CONCRETE AND MASONRY FOUNDATION WATERPROOFING.
-R406.3 DAMPPROOFING FOR WOOD FOUNDATIONS.
-R406.4 PRECAST CONCRETE FOUNDATION SYSTEM DAMPPROOFING.
SECTION R407 COLUMNS
REFER TO SECTION 407 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR COLUMNS INCLUDING THE FOLLOWING AREAS:
-R407.1 WOOD COLUMN PROTECTION.
-R407.2 STEEL COLUMN PROTECTION.
-R407.3 STRUCTURAL REQUIREMENTS.
SECTION R408 UNDER-FLOOR SPACE
REFER TO SECTION 408 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR UNDER-FLOOR SPACE INCLUDING THE
FOLLOWING AREA:
-R408.1 VENTILATION.
-R408.2 OPENINGS FOR UNDER-FLOOR VENTILATION.
-R408.3 UN-VENTED CRAWL SPACE.
-R408.4 ACCESS.
-R408.5 REMOVAL OF DEBRIS.
-R408.6 FINISHED GRADE.
-R408.7 FLOOD RESISTANCE.
CHAPTER 5 :: FLOORS
SECTION R501 GENERAL
R501.1 APPLICATION.
THE PROVISIONS OF THIS CHAPTER SHALL CONTROL THE DESIGN AND
CONSTRUCTION OF THE FLOORS FOR BUILDINGS, INCLUDING THE
FLOORS OF ATTIC SPACES USED TO HOUSE MECHANICAL OR
PLUMBING FIXTURES AND EQUIPMENT.
R501.2 REQUIREMENTS.
FLOOR CONSTRUCTION SHALL BE CAPABLE OF ACCOMMODATING ALL
LOADS IN ACCORDANCE WITH SECTION R301 AND OF TRANSMITTING
THE RESULTING LOADS TO THE SUPPORTING STRUCTURAL ELEMENTS.
SECTION R502 WOOD FLOOR FRAMING
R502.1 GENERAL.
WOOD AND WOOD-BASED PRODUCTS USED FOR LOAD-SUPPORTING
PURPOSES SHALL CONFORM TO THE APPLICABLE PROVISIONS OF THIS
SECTION. SEE SECTIONS 502.1.1 THROUGH 502.1.7 FOR FURTHER
SPECIFICATIONS.
R502.2 DESIGN AND CONSTRUCTION.
FLOORS SHALL BE DESIGNED AND CONSTRUCTED IN ACCORDANCE
WITH THE PROVISIONS OF THIS CHAPTER, FIGURE R502.2 AND
SECTIONS R317 AND R318 OR IN ACCORDANCE WITH ANSI AWC NDS.
SEE SECTIONS 502.2.1 THROUGH 502.2.2 FOR FURTHER
SPECIFICATIONS.
R502.3 ALLOWABLE JOIST SPANS.
SPANS FOR FLOOR JOISTS SHALL BE IN ACCORDANCE WITH TABLES
R502.3.1(1) AND R502.3.1(2). FOR OTHER GRADES AND SPECIES AND
FOR OTHER LOADING CONDITIONS, REFER TO THE AWC STJR. SEE
SECTIONS 502.3.1 THROUGH 502.3.3 FOR FURTHER SPECIFICATIONS.
R502.4 JOISTS UNDER BEARING PARTITIONS.
JOISTS UNDER PARALLEL BEARING PARTITIONS SHALL BE OF
ADEQUATE SIZE TO SUPPORT THE LOAD.DOUBLE JOISTS, SIZED TO
ADEQUATELY SUPPORT THE LOAD, THAT ARE SEPARATED TO PERMIT
THE INSTALLATION OF PIPING OR VENTS SHALL BE FULL DEPTH SOLID
BLOCKED WITH LUMBER NOT LESS THAN 2 INCHES (51 MM) IN NOMINAL
THICKNESS SPACED NOT MORE THAN 4 FEET (1219 MM) ON CENTER.
BEARING PARTITIONS PERPENDICULAR TO JOISTS SHALL NOT BE
OFFSET FROM SUPPORTING GIRDERS, WALLS OR PARTITIONS MORE
THAN THE JOIST DEPTH UNLESS SUCH JOISTS ARE OF SUFFICIENT SIZE
TO CARRY THE ADDITIONAL LOAD.
CHAPTER 4 :: FOUNDATIONS
SECTION R401 GENERAL
R401.2 REQUIREMENTS.
FOUNDATION CONSTRUCTION SHALL BE CAPABLE OF
ACCOMMODATING ALL LOADS IN ACCORDANCE WITH SECTION R301
AND OF TRANSMITTING THE RESULTING LOADS TO THE
SUPPORTING SOIL. FILL SOILS THAT SUPPORT FOOTINGS AND
FOUNDATIONS SHALL BE DESIGNED, INSTALLED AND TESTED IN
ACCORDANCE WITH ACCEPTED ENGINEERING PRACTICE.
R401.3 DRAINAGE.
SURFACE DRAINAGE SHALL BE DIVERTED TO A STORM SEWER
CONVEYANCE OR OTHER APPROVED POINT OF COLLECTION THAT
DOES NOT CREATE A HAZARD. LOTS SHALL BE GRADED TO DRAIN
SURFACE WATER AWAY FROM FOUNDATION WALLS. THE GRADE
SHALL FALL NOT FEWER THAN 6 INCHES (152 MM) WITHIN THE
FIRST 10 FEET (3048 MM).
NOTE: SEE SECTION R401.3 FOR EXCEPTIONS
R401.4 SOIL TESTS.
WHERE QUANTIFIABLE DATA CREATED BY ACCEPTED SOIL
SCIENCE METHODOLOGIES INDICATE EXPANSIVE SOILS,
COMPRESSIBLE SOILS, SHIFTING SOILS, OR OTHER QUESTIONABLE
SOIL CHARACTERISTICS ARE LIKELY TO BE PRESENT, THE
BUILDING OFFICIAL SHALL DETERMINE WHETHER TO REQUIRE A
SOIL TEST TO DETERMINE THE SOIL’S CHARACTERISTICS AT A
PARTICULAR LOCATION. THIS TEST SHALL BE DONE BY AN
APPROVED AGENCY USING AN APPROVED METHOD.
SECTION R402 MATERIALS
R402.1 WOOD FOUNDATIONS.
WOOD FOUNDATION SYSTEMS SHALL BE DESIGNED AND
INSTALLED IN ACCORDANCE WITH THE PROVISIONS OF THIS CODE.
R402.1.1 FASTENERS.
FASTENERS USED BELOW GRADE TO ATTACH PLYWOOD TO THE
EXTERIOR SIDE OF EXTERIOR BASEMENT OR CRAWLSPACE WALL
STUDS, OR FASTENERS USED IN KNEE WALL CONSTRUCTION,
SHALL BE OF TYPE 304 OR 316 STAINLESS STEEL. FASTENERS
USED ABOVE GRADE TO ATTACH PLYWOOD AND ALL
LUMBER-TOLUMBER FASTENERS EXCEPT THOSE USED IN KNEE
WALL CONSTRUCTION SHALL BE OF TYPE 304 OR 316 STAINLESS
STEEL, SILICON BRONZE, COPPER, HOT-DIPPED GALVANIZED (ZINC
COATED) STEEL NAILS, OR HOT-TUMBLED GALVANIZED (ZINC
COATED) STEEL NAILS. ELECTRO-GALVANIZED STEEL NAILS AND
GALVANIZED (ZINC COATED) STEEL STAPLES SHALL NOT BE
PERMITTED.
R402.1.2 WOOD TREATMENT.
LUMBER AND PLYWOOD SHALL BE PRESSURE-PRESERVATIVE
TREATED AND DRIED AFTER TREATMENT IN ACCORDANCE WITH
AWPA U1 (COMMODITY SPECIFICATION A, SPECIAL REQUIREMENT
4.2), AND SHALL BEAR THE LABEL OF AN ACCREDITED AGENCY.
WHERE LUMBER OR PLYWOOD IS CUT OR DRILLED AFTER
TREATMENT, THE TREATED SURFACE SHALL BE FIELD TREATED
WITH COPPER NAPHTHENATE, THE CONCENTRATION OF WHICH
SHALL CONTAIN NOT LESS THAN 2-PERCENT COPPER METAL, BY
REPEATED BRUSHING, DIPPING OR SOAKING UNTIL THE WOOD
CANNOT ABSORB MORE PRESERVATIVE.
R402.2 CONCRETE.
CONCRETE SHALL HAVE A MINIMUM SPECIFIED COMPRESSIVE
STRENGTH OF F SC, AS SHOWN IN TABLE R402.2. CONCRETE
SUBJECT TO MODERATE OR SEVERE WEATHERING AS INDICATED
IN TABLE R301.2(1) SHALL BE AIR ENTRAINED AS SPECIFIED IN
TABLE R402.2. THE MAXIMUM WEIGHT OF FLY ASH, OTHER
POZZOLANS, SILICA FUME, SLAG OR BLENDED CEMENTS THAT IS
INCLUDED IN CONCRETE MIXTURES FOR GARAGE FLOOR SLABS
AND FOR EXTERIOR PORCHES, CARPORT SLABS AND STEPS THAT
WILL BE EXPOSED TO DEICING CHEMICALS SHALL NOT EXCEED
THE PERCENTAGES OF THE TOTAL WEIGHT OF CEMENTITIOUS
MATERIALS SPECIFIED IN SECTION 19.3.3.4 OF ACI MATERIALS
USED TO PRODUCE CONCRETE AND TESTING THEREOF SHALL
COMPLY WITH THE APPLICABLE STANDARDS LISTED IN CHAPTERS
19 AND 20 OF ACI 318 OR ACI 332. R402.2.1
SECTION 403 FOOTINGS
R403.1 GENERAL.
ALL EXTERIOR WALLS SHALL BE SUPPORTED ON CONTINUOUS
SOLID OR FULLY GROUTED MASONRY OR CONCRETE FOOTINGS,
CRUSHED STONE FOOTINGS, WOOD FOUNDATIONS, OR OTHER
APPROVED STRUCTURAL SYSTEMS THAT SHALL BE OF SUFFICIENT
DESIGN TO ACCOMMODATE ALL LOADS ACCORDING TO SECTION
R301 AND TO TRANSMIT THE RESULTING LOADS TO THE SOIL
WITHIN THE LIMITATIONS AS DETERMINED FROM THE CHARACTER
OF THE SOIL. FOOTINGS SHALL BE SUPPORTED ON UNDISTURBED
NATURAL SOILS OR ENGINEERED FILL. CONCRETE FOOTINGS
SHALL BE DESIGNED AND CONSTRUCTED IN ACCORDANCE WITH
THE PROVISIONS OF SECTION R403 OR IN ACCORDANCE WITH ACI
332.
R403.1.1 MINIMUM SIZE.
THE MINIMUM WIDTH, W, AND THICKNESS, T, FOR CONCRETE
FOOTINGS SHALL BE IN ACCORDANCE WITH TABLES R403.1(1)
THROUGH R403.1(3) AND FIGURE R403.1(1) OR R403.1.3, AS
APPLICABLE. THE FOOTING WIDTH SHALL BE BASED ON THE
LOAD-BEARING VALUE OF THE SOIL IN ACCORDANCE WITH TABLE
R401.4.1. FOOTING PROJECTIONS, P, SHALL BE NOT LESS THAN 2
INCHES (51 MM) AND SHALL NOT EXCEED THE THICKNESS OF THE
FOOTING. FOOTING THICKNESS AND PROJECTION FOR
FIREPLACES SHALL BE IN ACCORDANCE WITH SECTION R1001.2.
THE SIZE OF FOOTINGS SUPPORTING PIERS AND COLUMNS SHALL
BE BASED ON THE TRIBUTARY LOAD AND ALLOWABLE SOIL
PRESSURE IN ACCORDANCE WITH TABLE R401.4.1. FOOTINGS FOR
WOOD FOUNDATIONS SHALL BE IN ACCORDANCE WITH THE
DETAILS SET FORTH IN SECTION R403.2, AND FIGURES R403.1(2)
AND R403.1(3). FOOYINGS FOR PRECAST FOUNDATIONS SHALL BE
IN ACCORDANCE WITH THE DETAILS SET FORTH IN SECTION
R403.4, TABLE R403.4, AND FIGURES R403.4(1) AND R403.4(2).
REFER TO THESE SECTIONS FOR THE FOLLOWING TOPICS:
-R403.1.2 CONTINUOUS FOOTING IN SEISMIC DESIGN CATEGORIES
D0, D1 AND D2.
-R403.1.3 FOOTING AND STEM WALL REINFORCING IN SEISMIC
DESIGN CATEGORIES D0, D1, AND D2.
-R403.1.3.4 INTERIOR BEARING AND BRACED WALL PANEL
FOOTINGS IN SEISMIC DESIGN CATEGORIES D0, D1 AND D2.
-R403.1.3.5 REINFORCEMENT.
-R403.1.3.6 ISOLATED CONCRETE FOOTINGS.
R403.1.4 MINIMUM DEPTH.
EXTERIOR FOOTINGS SHALL BE PLACED NOT LESS THAN 12
INCHES (305 MM) BELOW THE UNDISTURBED GROUND SURFACE.
WHERE APPLICABLE, THE DEPTH OF FOOTINGS
SHALL ALSO CONFORM TO SECTIONS R403.1.4.1 THROUGH
R403.1.4.2.
R403.1.4.1 FROST PROTECTION.
EXCEPT WHERE OTHERWISE PROTECTED FROM FROST, FOUNDATION
WALLS, PIERS AND OTHER PERMANENT SUPPORTS OF BUILDINGS AND
STRUCTURES SHALL BE PROTECTED FROM FROST BY ONE OR MORE OF
THE FOLLOWING METHODS:
1. EXTENDED BELOW THE FROST LINE SPECIFIED IN TABLE R301.2.(1).
2. CONSTRUCTED IN ACCORDANCE WITH SECTION R403.3.
3.CONSTRUCTED IN ACCORDANCE WITH ASCE 32.
ERECTED NO SOLID ROCK.
4. FOOTINGS SHALL NOT BEAR ON FROZEN SOIL UNLESS THE FROZEN
CONDITION IS PERMANENT.
NOTE: SEE SECTION R403.1.4.1 FOR EXCEPTIONS
R403.1.5 SLOPE.
THE TOP SURFACE OF FOOTINGS SHALL BE LEVEL. THE BOTTOM
SURFACE OF FOOTINGS SHALL NOT HAVE A SLOPE EXCEEDING ONE
UNIT VERTICAL IN 10 UNITS HORIZONTAL (10-PERCENT SLOPE).
FOOTINGS SHALL BE STEPPED WHERE IT IS NECESSARY TO CHANGE
THE ELEVATION OF THE TOP SURFACE OF THE FOOTINGS OR WHERE
THE SLOPE OF THE BOTTOM SURFACE OF THE FOOTINGS WILL EXCEED
ONE UNIT VERTICAL IN 10 UNITS HORIZONTAL (10-PERCENT SLOPE).
R403.1.6 FOUNDATION ANCHORAGE.
WOOD SILL PLATES AND WOOD WALLS SUPPORTED DIRECTLY ON
CONTINUOUS FOUNDATIONS SHALL BE ANCHORED TO THE FOUNDATION
IN ACCORDANCE WITH THIS SECTION.
COLD-FORMED STEEL FRAMING SHALL BE ANCHORED DIRECTLY TO THE
FOUNDATION OR FASTENED TO WOOD SILL PLATES IN ACCORDANCE
WITH SECTION R505.3.1 OR R603.3.1, AS APPLICABLE. WOOD SILL PLATES
SUPPORTING COLD-FORMED STEEL FRAMING SHALL BE ANCHORED TO
THE FOUNDATION IN ACCORDANCE WITH THIS SECTION.
WOOD SOLE PLATES AT ALL EXTERIOR WALLS ON MONOLITHIC SLABS,
WOOD SOLE PLATES OF BRACED WALL PANELS AT BUILDING INTERIORS
ON MONOLITHIC SLABS AND ALL WOOD SILL PLATES SHALL BE
ANCHORED TO THE FOUNDATION WITH MINIMUM 1/2-INCH DIAMETER
(12.7 MM) ANCHOR BOLTS SPACED NOT GREATER THAN 6 FEET (1829
MM) ON CENTER OR APPROVED ANCHORS OR ANCHOR STRAPS SPACED
AS REQUIRED TO PROVIDE EQUIVALENT ANCHORAGE TO
1/2-INCH-DIAMETER (12.7 MM) ANCHOR BOLTS. BOLTS SHALL EXTEND
NOT LESS THAN 7 INCHES (178 MM) INTO CONCRETE OR GROUTED
CELLS OF CONCRETE MASONRY UNITS. THE BOLTS SHALL BE LOCATED
IN THE MIDDLE THIRD OF THE WIDTH OF THE PLATE. A NUT AND WASHER
SHALL BE TIGHTENED ON EACH ANCHOR BOLT. THERE SHALL BE NOT
FEWER THAN TWO BOLTS PER PLATE SECTION WITH ONE BOLT
LOCATED NOT MORE THAN 12 INCHES (305 MM) OR LESS THAN SEVEN
BOLT DIAMETERS FROM EACH END OF THE PLATE SECTION. INTERIOR
BEARING WALL SOLE PLATES ON MONOLITHIC SLAB FOUNDATION THAT
ARE NOT PART OF A BRACED WALL PANEL SHALL BE POSITIVELY
ANCHORED WITH APPROVED FASTENERS. SILL PLATES AND SOLE
PLATES SHALL BE PROTECTED AGAINST DECAY AND TERMITES
WHERE REQUIRED BY SECTIONS R317 AND R318.
NOTE:SEE SECTION 403.1.6 FOR EXCEPTIONS
R403.1.6.1 FOUNDATION ANCHORAGE IN SEISMIC DESIGN CATEGORIES
C, D0, D1 AND D2.
IN ADDITION TO THE REQUIREMENTS OF SECTION R403.1.6, THE
FOLLOWING REQUIREMENTS SHALL APPLY TO WOOD LIGHT-FRAME
STRUCTURES IN SEISMIC DESIGN CATEGORIES D0, D1 AND D2 AND
WOOD LIGHT-FRAME TOWNHOUSES IN SEISMIC DESIGN CAT. C.
NOTE:SEE SECTION 403.1.6.1 FOR REQUIREMENTS
R403.1.7 FOOTINGS ON OR ADJACENT TO SLOPES.
THE PLACEMENT OF BUILDINGS AND STRUCTURES ON OR ADJACENT TO
SLOPES STEEPER THAN ONE UNIT VERTICAL IN THREE UNITS
HORIZONTAL (33.3-PERCENT SLOPE) SHALL CONFORM TO SECTIONS
R403.1.7.1 THROUGH R403.1.7.4
R403.1.8 FOUNDATIONS ON EXPANSIVE SOILS.
FOUNDATION AND FLOOR SLABS FOR BUILDINGS LOCATED ON
EXPANSIVE SOILS SHALL BE DESIGNED IN ACCORDANCE WITH SECTION
1808.6 OF THE INTERNATIONAL BUILDING CODE.
NOTE:SEE SECTION 403.1.8 FOR EXCEPTION AND EXPANSIVE
SOILS CLASSIFICATIONS.
R403.2 FOOTINGS FOR WOOD FOUNDATIONS.
FOOTINGS FOR WOOD FOUNDATIONS SHALL BE IN ACCORDANCE WITH
FIGURES R403.1(2) AND R403.1(3). GRAVEL SHALL BE WASHED AND WELL
GRADED. THE MAXIMUM SIZE STONE SHALL NOT EXCEED 3/4 INCH (19.1
MM). GRAVEL SHALL BE FREE FROM ORGANIC, CLAYEY OR SILTY SOILS.
SAND SHALL BE COARSE, NOT SMALLER THAN 1/16-INCH (1.6 MM)
GRAINS AND SHALL BE FREE FROM ORGANIC, CLAYEY OR SILTY SOILS.
CRUSHED STONE SHALL HAVE A MAXIMUM SIZE OF 1/2 INCH (12.7 MM).
R403.3 FROST-PROTECTED SHALLOW FOUNDATIONS.
FOR BUILDINGS WHERE THE MONTHLY MEAN TEMPERATURE OF THE
BUILDING IS MAINTAINED AT NOT LESS THAN 64°F (18°C), FOOTINGS ARE
NOT REQUIRED TO EXTEND BELOW THE FROST LINE WHERE
PROTECTED FROM FROST BY INSULATION IN ACCORDANCE WITH
FIGURE R403.3(1) AND TABLE R403.3(1). FOUNDATIONS PROTECTED
FROM FROST IN ACCORDANCE WITH FIGURE R403.3(1) AND TABLE
R403.3(1) SHALL NOT BE USED FOR UNHEATED SPACES SUCH AS
PORCHES, UTILITY ROOMS, GARAGES AND CARPORTS, AND SHALL NOT
BE ATTACHED TO BASEMENTS OR CRAWL SPACES THAT ARE NOT
MAINTAINED AT A MINIMUM MONTHLY MEAN TEMPERATURE OF 64°F
(18°C).
REFER TO SECTION 403 FOR THE FOLLOWING AREAS:
-R403.3.1 FOUNDATIONS ADJOINING FROST-PROTECTED SHALLOW
FOUNDATIONS
-R403.3.2 PROTECTION OF HORIZONTAL INSULATION BELOW
GROUND.
-R403.3.3 DRAINAGE.
-R403.3.4 TERMITE PROTECTION.
R403.4 FOOTINGS FOR PRECAST CONCRETE FOUNDATIONS.
FOOTINGS FOR PRECAST CONCRETE FOUNDATIONS SHALL COMPLY
WITH SECTION R403.4.
SECTION 404
FOUNDATION AND RETAINING WALLS
R404.1 CONCRETE AND MASONRY FOUNDATION WALLS.
REFER TO SECTION 404.1 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR CONCRETE AND MASONRY FOUNDATION WALLS.
R404.2 WOOD FOUNDATION WALLS.
REFER TO SECTION 404.2 FOR FURTHER SPECIFICATIONS, NOTES AND
DESIGN CRITERIA FOR WOOD FOUNDATION WALLS.
R404.3 WOOD SILL PLATES.
WOOD SILL PLATES SHALL BE NOT LESS THAN 2-INCH BY 4-INCH (51 MM
BY 102 MM) NOMINAL LUMBER. SILL PLATE ANCHORAGE SHALL BE IN
ACCORDANCE WITH SECTIONS R403.1.6 AND R602.11.
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R502.5 ALLOWABLE GIRDER AND HEADER SPANS.
THE ALLOWABLE SPANS OF GIRDERS AND HEADERS FABRICATED
OF DIMENSION LUMBER SHALL NOT EXCEED THE VALUES SET
FORTH IN TABLES R602.7(1), R602.7(2) AND R602.7(3).
R502.6 BEARING.
THE ENDS OF EACH JOIST, BEAM OR GIRDER SHALL HAVE NOT
LESS THAN 1 1/2 INCHES (38 MM) OF BEARING ON WOOD OR METAL,
NOT LESS THAN 3 INCHES (76 MM) OF BEARING ON MASONRY OR
CONCRETEOR BE SUPPORTED BY APPROVED JOIST HANGERS.
ALTERNATIVELY, THE ENDS OF JOISTS SHALL BE SUPPORTED ON A
1-INCH BY 4-INCH (25 MM BY 102 MM) RIBBON STRIP AND SHALL BE
NAILED TO THE ADJACENT STUD. THE BEARING ON MASONRY OR
CONCRETE SHALL BE DIRECT, OR A SILL PLATE OF 2-INCH-MINIMUM
(51 mm) NOMINAL THICKNESS SHALL BE PROVIDED UNDER THE
JOIST, BEAM OR GIRDER. THE SILL PLATE SHALL PROVIDE A
MINIMUM NOMINAL BEARING AREA OF 48 SQUARE INCHES (30 865
MM2). SEE SECTIONS 502.6.1 THROUGH 502.6.2 FOR FURTHER
SPECIFICATIONS.
REFER TO THE IRC FOR FURTHER INFORMATION ON THE
FOLLOWING AREAS:
-R502.7 LATERAL RESTRAINT AT SUPPORTS.
-R502.8 CUTTING, DRILLING AND NOTCHING.
-R502.9 FASTENING.
-R502.10 FRAMING OF OPENINGS.
-R502.11 WOOD TRUSSES.
-R502.12 DRAFTSTOPPING REQUIRED.
-R502.13 FIREBLOCKING REQUIRED.
REFER TO THE IRC FOR THE FOLLOWING
SECTIONS:
SECTION 503 FLOOR SHEATHING
SECTION 504 PRESSURE PRESERVATIVE TREATED WOOD FLOORS
SECTION 505 COLD-FORMED STEEL FLOOR FRAMING
SECTION R506 CONCRETE FLOORS (ON
GROUND)
R506.1 GENERAL.
CONCRETE SLAB-ON-GROUND FLOORS SHALL BE DESIGNED AND
CONSTRUCTED IN ACCORDANCE WITH THE PROVISIONS OF THIS
SECTION OR ACI 332. FLOORS SHALL BE A MINIMUM 3 1/2 INCHES
(89 MM) THICK (FOR EXPANSIVE SOILS, SEE SECTION R403.1.8). THE
SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE SHALL BE AS
SET FORTH IN SECTION R402.2.
R506.2 SITE PREPARATION.
THE AREA WITHIN THE FOUNDATION WALLS SHALL HAVE ALL
VEGETATION, TOP SOIL AND FOREIGN MATERIAL REMOVED.
R506.2.1 FILL.
FILL MATERIAL SHALL BE FREE OF VEGETATION AND FOREIGN
MATERIAL. THE FILL SHALL BE COMPACTED TO ENSURE UNIFORM
SUPPORT OF THE SLAB, AND EXCEPT WHERE APPROVED, THE FILL
DEPTHS SHALL NOT EXCEED 24 INCHES (610 MM) FOR CLEAN SAND
OR GRAVEL AND 8 INCHES (203 MM) FOR EARTH.
R506.2.2 BASE.
A 4-INCH-THICK (102 MM) BASE COURSE CONSISTING OF CLEAN
GRADED SAND, GRAVEL, CRUSHED STONE, CRUSHED CONCRETE
OR CRUSHED BLAST-FURNACE SLAG PASSING A 2- INCH (51 MM)
SIEVE SHALL BE PLACED ON THE PREPARED SUBGRADE WHERE
THE SLAB IS BELOW GRADE.
NOTE:SEE SECTION 506.2.2 FOR EXCEPTION
R506.2.3 VAPOR RETARDER.
A 6-MIL (0.006 INCH; 152 ΜM) POLYETHYLENE OR APPROVED VAPOR
RETARDER WITH JOINTS LAPPED NOT LESS THAN 6 INCHES (152
MM) SHALL BE PLACED BETWEEN THE CONCRETE FLOOR SLAB
AND THE BASE COURSE OR THE PREPARED SUBGRADE WHERE A
BASE COURSE DOES NOT EXIST.
NOTE:SEE SECTION R506.2.3 FOR EXCEPTIONS
R506.2.4 REINFORCEMENT SUPPORT.
WHERE PROVIDED IN SLABS-ON-GROUND, REINFORCEMENT SHALL
BE SUPPORTED TO REMAIN IN PLACE FROM THE CENTER TO
UPPER ONE-THIRD OF THE SLAB FOR THE DURATION OF THE
CONCRETE PLACEMENT.
SECTION R507 DECKS
R507.1 DECKS.
WOOD-FRAMED DECKS SHALL BE IN ACCORDANCE WITH THIS
SECTION. FOR DECKS USING MATERIALS AND CONDITIONS NOT
PRESCRIBED IN THIS SECTIONS, REFER TO SECTION R301.
R507.2 MATERIALS.
MATERIALS USED FOR THE CONSTRUCTION OF DECKS SHALL
COMPLY WITH THIS SECTION.
R507.2.1 WOOD MATERIALS.
WOOD MATERIALS SHALL BE NO. 2 GRADE OR BETTER LUMBER
,PRESERVATIVE-TREATED IN ACCORDANCE WITH SECTION R317,
OR APPROVED, NATURALLY DURABLE LUMBER, AND TERMITE
PROTECTED WHERE REQUIRED IN ACCORDANCE WITH SECTION
R318. WHERE DESIGN IN ACCORDANCE WITH SECTION R301 IS
PROVIDED, WOOD STRUCTURAL MEMBERS SHALL BE DESIGNED
USING THE WET SERVICE FACTOR DEFINED IN AWC NDS. CUTS,
NOTCHES, AND DRILLED HOLES OF PRESERVATIVE TREATED
WOOD MEMBERS SHALL BE TREATED IN ACCORDANCE WITH
SECTION R317.1.1. ALL PRESERVATIVE-TREATED WOOD PRODUCTS
IN CONTACT WITH THE GROUND SHALL BE LABELED FOR SUCH
USAGE.
R507.2.1.1 ENGINEERED WOOD PRODUCTS.
ENGINEERED WOOD PRODUCTS SHALL BE IN ACCORDANCE WITH
SECTION R502.
R507.2.2 PLASTIC COMPOSITE DECK BOARDS, STAIR TREADS,
GUARDS, OR HANDRAILS.
PLASTIC COMPOSITE EXTERIOR DECK BOARDS, STAIR TREADS,
GUARDS AND HANDRAILS SHALL COMPLY WITH THE
REQUIREMENTS OF ASTM D7032 AND SECTION R507.3. SEE
SECTIONS R507.2.2.1 THROUGH R507.2.2.5 AND SECTIONS R507.2.3
THOUGHT R507.2.5 FOR FURTHER SPECIFICATIONS.
R507.2.3 FASTENERS AND CONNECTORS.
METAL FASTENERS AND CONNECTORS USED FOR ALL DECKS
SHALL BE IN ACCORDANCE WITH SECTION R317.3 AND TABLE
R507.2.3.
R507.3 FOOTINGS
REFER TO THE IRC FOR INFORMATION REGARDING FOOTINGS.
R507.4 DECK POSTS.
FOR SINGLE-LEVEL WOOD-FRAMED DECKS WITH BEAMS SIZED IN
ACCORDANCE WITH TABLE R507.5, DECK POST SIZE SHALL BE IN
ACCORDANCE WITH TABLE R507.4.
CHAPTER 8 :: WOOD ROOF FRAMING
R802.1 GENERAL.
WOOD AND WOOD-BASED PRODUCTS USED FOR LOAD SUPPORTING PURPOSES
SHALL CONFORM TO THE APPLICABLE PROVISIONS OF THIS SECTION.
SEE SECTIONS 802.1.1 THROUGH 802.1.7 FOR FURTHER SPECIFICATIONS.
R802.2 DESIGN AND CONSTRUCTION.
THE FRAMING DETAILS REQUIRED IN SECTION R802 APPLY TO ROOFS HAVING A
MINIMUM SLOPE OF THREE UNITS VERTICAL IN 12 UNITS HORIZONTAL
(25-PERCENT SLOPE) OR GREATER. ROOF-CEILINGS SHALL BE DESIGNED AND
CONSTRUCTED
IN ACCORDANCE WITH THE PROVISIONS OF THIS CHAPTER AND
FIGURES R606.11(1), R606.11(2) AND R606.11(3) OR IN ACCORDANCE
WITH AWC NDS. COMPONENTS OF ROOF-CEILINGS SHALL BE FASTENED IN
ACCORDANCE WITH TABLE R602.3(1).
R802.3 FRAMING DETAILS.
RAFTERS SHALL BE FRAMED NOT MORE THAN 1 1/2-INCHES (38 MM) OFFSET
FROM EACH OTHER TO RIDGE BOARD OR DIRECTLY OPPOSITE FROM EACH
OTHER WITH A GUSSET PLATE AS A TIE. RIDGE BOARD SHALL BE NOT LESS
THAN 1-INCH (25 MM) NOMINAL THICKNESS AND NOT LESS IN DEPTH THAN THE
CUT END OF THE
RAFTER. AT VALLEYS AND HIPS THERE SHALL BE A VALLEY OR HIP RAFTERNOT
LESS THAN 2-INCH (51 MM) NOMINAL THICKNESS AND NOT LESS IN DEPTH THAN
THE CUT END OF THE RAFTER. HIP AND VALLEY RAFTERS SHALL BE SUPPORTED
AT THE RIDGE BY A BRACE TO A BEARING PARTITION OR BE DESIGNED TO
CARRY AND DISTRIBUTE THE SPECIFIC LOAD AT THAT POINT. WHERE THE ROOF
PITCH IS LESS THAN THREE UNITS VERTICAL IN 12 UNITS HORIZONTAL
(25-PERCENT SLOPE), STRUCTURAL MEMBERS THAT SUPPORT RAFTERS AND
CEILING JOISTS, SUCH AS RIDGE BEAMS, HIPS AND VALLEYS, SHALL BE
DESIGNED AS BEAMS.
REFER TO THE IRC FOR FURTHER INFORMATION ON THE FOLLOWING AREAS:
R802.4 ALLOWABLE CEILING JOIST SPANS.
R802.5 ALLOWABLE RAFTER SPANS.
R802.6 BEARING.
R802.7 CUTTING, DRILLING AND NOTCHING.
R802.8 LATERAL SUPPORT.
R802.9 FRAMING OF OPENINGS.
R802.10 WOOD TRUSSES.
R802.10.1 TRUSS DESIGN DRAWINGS. TRUSS DESIGN DRAWINGS,
PREPARED IN CONFORMANCE TO SECTION R802.10.1, SHALL
BE PROVIDED TO THE BUILDING OFFICIAL AND APPROVED PRIOR TO
INSTALLATION. TRUSS DESIGN DRAWINGS SHALL BE PROVIDED WITH THE
SHIPMENT OF TRUSSES DELIVERED TO THE JOB SITE. TRUSS DESIGN
DRAWINGS SHALL INCLUDE, AT A MINIMUM, THE FOLLOWING INFORMATION:
REFER TO SECTION 802 10.1 (1-12 FOR MINIMUM INFORMATION)
R802.10.2 DESIGN.
WOOD TRUSSES SHALL BE DESIGNED IN ACCORDANCE WITH ACCEPTED
ENGINEERING PRACTICE. THE DESIGN AND MANUFACTURE OF
METAL-PLATE-CONNECTED WOOD TRUSSES SHALL COMPLY WITH ANSI/TPI 1.
THE TRUSS DESIGN DRAWINGS SHALL BE PREPARED BY A REGISTERED
PROFESSIONAL WHERE REQUIRED BY THE STATUTES OF THE JURISDICTION IN
WHICH THE PROJECT IS TO BE CONSTRUCTED IN ACCORDANCE WITH SECTION
R106.1.
R802.10.3 BRACING.
TRUSSES SHALL BE BRACED TO PREVENT ROTATION AND PROVIDE LATERAL
STABILITY IN ACCORDANCE WITH THE REQUIREMENTS SPECIFIED IN THE
CONSTRUCTION DOCUMENTS FOR THE BUILDING AND ON THE INDIVIDUAL
TRUSS DESIGN DRAWINGS. IN THE ABSENCE OF SPECIFIC BRACING
REQUIREMENTS, TRUSSES SHALL BE BRACED IN ACCORDANCE WITH ACCEPTED
INDUSTRY PRACTICE SUCH AS THE SBCA BUILDING COMPONENT SAFETY
INFORMATION (BDSI) GUIDE TO GOOD PRACTICE FOR HANDLING, INSTALLING &
BRACING OF METAL PLATE CONNECTED WOOD TRUSSES.
R802.10.4 ALTERATIONS TO TRUSSES.
TRUSS MEMBERS SHALL NOT BE CUT, NOTCHED, DRILLED, SPLICED OR
OTHERWISE ALTERED IN ANY WAY WITHOUT THE APPROVAL OF A REGISTERED
DESIGN PROFESSIONAL. ALTERATIONS RESULTING IN THE ADDITION OF LOAD
SUCH AS HVAC EQUIPMENT WATER HEATER THAT EXCEEDS THE DESIGN LOAD
FOR THE TRUSS SHALL NOT BE PERMITTED WITHOUT VERIFICATION THAT THE
TRUSS IS CAPABLE OF SUPPORTING SUCH ADDITIONAL LOADING.
R802.11 ROOF TIE-DOWN.
R802.11.1 UPLIFT RESISTANCE. ROOF ASSEMBLIES SHALL HAVE
UPLIFT RESISTANCE IN ACCORDANCE WITH SECTIONS R802.11.1.1 AND
R802.11.1.2. WHERE THE UPLIFT FORCE DOES NOT EXCEED 200 POUNDS (90.8
KG), RAFTERS AND TRUSSES SPACED NOT MORE THAN 24 INCHES (610 MM) ON
CENTER SHALL BE PERMITTED TO BE ATTACHED TO THEIR SUPPORTING WALL
ASSEMBLIES IN ACCORDANCE WITH TABLE R602.3(1). WHERE THE BASIC WIND
SPEED DOES NOT EXCEED 115 MPH, THE WIND EXPOSURE CATEGORY IS B, THE
ROOF PITCH IS 5:12 (42-PERCENT SLOPE) OR GREATER, AND THE ROOF SPAN IS
32 FEET (9754 MM) OR LESS, RAFTERS AND TRUSSES SPACED NOT MORE THAN
24 INCHES (610 MM) ON CENTER SHALL BE PERMITTED TO BE ATTACHED TO
THEIR SUPPORTING WALL ASSEMBLIES IN ACCORDANCE WITH TABLE R602.3(1).
R802.11.1.1 TRUSS UPLIFT RESISTANCE.
TRUSSES SHALL BE ATTACHED TO SUPPORTING WALL ASSEMBLIES BY
CONNECTIONS CAPABLE OF RESISTING UPLIFT FORCES AS SPECIFIED ON THE
TRUSS DESIGN DRAWINGS FOR THE ULTIMATE DESIGN WIND SPEED AS
DETERMINED BY FIGURE R301.2(5)A AND LISTED IN TABLE R301.2(1) OR AS
SHOWN ON THE CONSTRUCTION DOCUMENTS. UPLIFT FORCES SHALL BE
PERMITTED TO BE DETERMINED AS SPECIFIED BY TABLE R802.11, IF
APPLICABLE, OR AS DETERMINED BY ACCEPTED ENGINEERING PRACTICE.
R802.11.1.2 RAFTER UPLIFT RESISTANCE.
INDIVIDUAL RAFTERS SHALL BE ATTACHED TO SUPPORTING WALL ASSEMBLIES
BY CONNECTIONS CAPABLE OF RESISTING UPLIFT FORCES AS DETERMINED BY
TABLE R802.11 OR AS DETERMINED BY ACCEPTED ENGINEERING PRACTICE.
CONNECTIONS FOR BEAMS USED IN A ROOF SYSTEM SHALL BE DESIGNED IN
ACCORDANCE WITH ACCEPTED ENGINEERING PRACTICE.
REFER TO THE IRC FOR THE FOLLOWING SECTIONS:
SECTION 803 ROOF SHEATHING
SECTION 804 COLD-FORMED STEEL ROOF FRAMING
SECTION 805 CEILING FINISHES
R805.1 CEILING INSTALLATION.
CEILINGS SHALL BE INSTALLED IN ACCORDANCE WITH THE REQUIREMENTS FOR
INTERIOR WALL FINISHES AS PROVIDED IN SECTION R702.
R507.4.1 DECK POST TO FOOTING CONNECTION.
WHERE POSTS BEAR ON CONCRETE FOOTINGS IN ACCORDANCE WITH
SECTION R403 AND FIGURE R507.4.1, LATERAL RESTRAINT SHALL BE
PROVIDED BY MANUFACTURED CONNECTORS OR A MINIMUM POST
EMBEDMENT OF 12 INCHES (305 MM) IN SURROUNDING SOILS OR
CONCRETE PIERS. OTHER FOOTING SYSTEMS SHALL BE PERMITTED.
NOTE: SEE SECTION R507.4.1 FOR EXCEPTIONS
R507.5 DECK BEAMS.
MAXIMUM ALLOWABLE SPANS FOR WOOD DECK BEAMS, AS SHOWN IN
FIGURE R507.5, SHALL BE IN ACCORDANCE WITH TABLE R507.5. BEAM
PLIES SHALL BE FASTENED WITH TWO ROWS OF 10D (3-INCH X
0.128-INCH) NAILS MINIMUM AT 16 INCHES (406 MM) ON CENTER ALONG
EACH EDGE. BEAMS SHALL BE PERMITTED TO CANTILEVER AT EACH END
UP TO ONE-FOURTH OF THE ALLOWABLE BEAM SPAN. DECK BEAMS OF
OTHER MATERIALS SHALL BE PERMITTED WHERE DESIGNED IN
ACCORDANCE WITH ACCEPTED ENGINEERING PRACTICES.
R507.7 DECKING.
MAXIMUM ALLOWABLE SPACING FOR JOISTS SUPPORTING DECKING
SHALL BE IN ACCORDANCE WITH TABLE R507.7. WOOD DECKING SHALL
BE ATTACHED TO EACH SUPPORTING MEMBER WITH NOT LESS THAN
TWO 8D THREADED NAILS OR TWO NO. 8 WOOD SCREWS. OTHER
APPROVED DECKING OR FASTENER SYSTEMS SHALL BE INSTALLED IN
ACCORDANCE WITH THE MANUFACTURER’S INSTALLATION
REQUIREMENTS.
R507.8 VERTICAL AND LATERAL SUPPORTS.
WHERE SUPPORTED BY ATTACHMENT TO AN EXTERIOR WALL, DECKS
SHALL BE POSITIVELY ANCHORED TO THE PRIMARY STRUCTURE AND
DESIGNED FOR BOTH VERTICAL AND LATERAL LOADS. SUCH
ATTACHMENT SHALL NOT BE ACCOMPLISHED BY THE USE OF TOENAILS
OR NAILS SUBJECT TO WITHDRAWAL. FOR DECKS WITH CANTILEVERED
FRAMING MEMBERS, CONNECTION TO EXTERIOR WALLS OR OTHER
FRAMING MEMBERS SHALL BE DESIGNED AND CONSTRUCTED TO RESIST
UPLIFT RESULTING FROM THE FULL LIVE LOAD SPECIFIED IN TABLE
R301.5 ACTING ON THE CANTILEVERED PORTION OF THE DECK. WHERE
POSITIVE CONNECTION TO THE PRIMARY BUILDING STRUCTURE CANNOT
BE VERIFIED DURING INSPECTION, DECKS SHALL BE SELF-SUPPORTING.
R507.8.1 DECK POST TO DECK FOOTING.
POSTS SHALL BEAR ON FOOTINGS IN ACCORDANCE WITH SECTION R403
AND FIGURE R507.8.1. POSTS SHALL BE RESTRAINED TO PREVENT
LATERAL DISPLACEMENT AT THE BOTTOM SUPPORT. SUCH LATERAL
RESTRAINT SHALL BE PROVIDED BY MANUFACTURED CONNECTORS
INSTALLED IN ACCORDANCE WITH SECTION R507 AND THE
MANUFACTURERS’ INSTRUCTIONS OR A MINIMUM POST EMBEDMENT OF
12 INCHES (305 MM) IN SURROUNDING SOILS OR CONCRETE PIERS.
CHAPTER 6 :: WALL CONSTRUCTION
SECTION R601 GENERAL
R601.1 APPLICATION.
THE PROVISIONS OF THIS CHAPTER SHALL CONTROL THE DESIGN AND
CONSTRUCTION OF WALLS AND PARTITIONS FOR BUILDINGS.
R601.2 REQUIREMENTS.
WALL CONSTRUCTION SHALL BE CAPABLE OF ACCOMMODATING ALL
LOADS IMPOSED IN ACCORDANCE WITH SECTION R301 AND OF
TRANSMITTING THE RESULTING LOADS TO THE SUPPORTING
STRUCTURAL ELEMENTS.
SECTION R602 WOOD WALL FRAMING
R602.1 GENERAL.
WOOD AND WOOD-BASED PRODUCTS USED FOR LOAD SUPPORTING
PURPOSES SHALL CONFORM TO THE APPLICABLE PROVISIONS OF THIS
SECTION. SEE SECTIONS 602.6.1 THROUGH 502.6.10 FOR FURTHER
SPECIFICATIONS.
R602.2 GRADE. STUDS SHALL BE A MINIMUM NO. 3, STANDARD OR
STUD GRADE LUMBER.
NOTE:SEE SECTION 506.2.2 FOR EXCEPTION
R602.3 DESIGN AND CONSTRUCTION.
EXTERIOR WALLS OF WOODFRAME CONSTRUCTION SHALL BE DESIGNED
AND CONSTRUCTED IN ACCORDANCE WITH THE PROVISIONS OF THIS
CHAPTER AND FIGURES R602.3(1) AND R602.3(2), OR IN ACCORDANCE
WITH AWC NDS. COMPONENTS OF EXTERIOR WALLS SHALL BE
FASTENED IN ACCORDANCE WITH TABLES R602.3(1) THROUGH R602.3(4).
WALL SHEATHING SHALL BE FASTENED DIRECTLY TO FRAMING
MEMBERS AND, WHERE PLACED ON THE EXTERIOR SIDE OF AN
EXTERIOR WALL, SHALL BE CAPABLE OF RESISTING THE WIND
PRESSURES LISTED IN TABLE R301.2(2) ADJUSTED FOR HEIGHT AND
EXPOSURE USING TABLE R301.2(3) AND SHALL CONFORM TO THE
REQUIREMENTS OF TABLE R602.3(3). WALL SHEATHING USED ONLY FOR
EXTERIOR WALL COVERING PURPOSES SHALL COMPLY WITH SECTION
R703.
STUDS SHALL BE CONTINUOUS FROM SUPPORT AT THE SOLE PLATE TO
A SUPPORT AT THE TOP PLATE TO RESIST LOADS PERPENDICULAR TO
THE WALL. THE SUPPORT SHALL BE FOUNDATION OR FLOOR, CEILING
OR ROOF DIAPHRAGM OR SHALL BE DESIGNED IN ACCORDANCE WITH
ACCEPTED ENGINEERING PRACTICE.
NOTE:SEE SECTION 506.2.3 FOR EXCEPTION
SEE SECTIONS 602.3.1 THROUGH 603.3.5 FOR FURTHER SPECIFICATIONS.
REFER TO THE IRC FOR FURTHER INFORMATION ON THE FOLLOWING
AREAS:
R602.4 INTERIOR LOAD-BEARING WALLS.
R602.5 INTERIOR NONBEARING WALLS.
R602.6 DRILLING AND NOTCHING OF STUDS.
R602.7 HEADERS.
R602.8 FIREBLOCKING REQUIRED.
R602.9 CRIPPLE WALLS.
R602.10 WALL BRACING.
BUILDINGS SHALL BE BRACED IN ACCORDANCE WITH THIS SECTION OR,
WHEN APPLICABLE, SECTION R602.12. WHERE A BUILDING, OR PORTION
THEREOF, DOES NOT COMPLY WITH ONE OR MORE OF THE BRACING
REQUIREMENTS IN THIS SECTION, THOSE PORTIONS SHALL BE
DESIGNED AND CONSTRUCTED IN ACCORDANCE WITH SECTION R301.1.
REFER TO SECTIONS 602.10.1 THROUGH 602.10.12 FOR BRACED WALL
PANELS, DESIGN AND CRITERIA.
REFER TO THE IRC FOR THE FOLLOWING
SECTIONS:
SECTION 603 COLD-FORMED STEEL WALL FRAMING
SECTION 604 WOOD STRUCTURAL PANELS
SECTION 605 PARTICLEBOARD
SECTION 606 GENERAL MASONRY CONSTRUCTION
SECTION 607 GLASS UNIT MASONRY
SECTION 608 EXTERIOR CONC. WALL CONSTRUCTION
SECTION 609 (SEE BELOW)
SECTION R610 STRUCTURAL INSULATED PANEL WALL CONSTRUCTION
SECTION R609 EXTERIOR WINDOWS AND
DOORS.
R609.1 GENERAL.
THIS SECTION PRESCRIBES PERFORMANCE AND CONSTRUCTION
REQUIREMENTS FOR EXTERIOR WINDOWS AND DOORS INSTALLED
IN WALLS. WINDOWS AND DOORS SHALL BE INSTALLED AND
FLASHED IN ACCORDANCE WITH THE FENESTRATION
MANUFACTURER’S WRITTEN INSTRUCTIONS. WINDOW AND DOOR
OPENINGS SHALL BE FLASHED IN ACCORDANCE WITH SECTION
R703.4. WRITTEN INSTALLATION INSTRUCTIONS SHALL BE
PROVIDED BY THE FENESTRATION MANUFACTURER FOR EACH
WINDOW OR DOOR.
R609.2 PERFORMANCE. EXTERIOR WINDOWS AND DOORS SHALL
BE CAPABLE OF RESISTING THE DESIGN WIND LOADS SPECIFIED IN
TABLE R301.2(2) ADJUSTED FOR HEIGHT AND EXPOSURE IN
ACCORDANCE WITH TABLE R301.2(3) OR DETERMINED IN
ACCORDANCE WITH ASCE 7 USING THE ALLOWABLE STRESS
DESIGN LOAD COMBINATIONS OF ASCE 7. FOR EXTERIOR
WINDOWS AND DOORS TESTED IN ACCORDANCE WITH SECTIONS
R609.3 AND R609.5, REQUIRED DESIGN WIND PRESSURES
DETERMINED FROM ASCE 7 USING THE ULTIMATE STRENGTH
DESIGN (USD) ARE PERMITTED TO BE MULTIPLIED BY 0.6. DESIGN
WIND LOADS FOR EXTERIOR GLAZING NOT PART OF A LABELED
ASSEMBLY SHALL BE PERMITTED TO BE DETERMINED IN
ACCORDANCE WITH CHAPTER 24 OF THE IRC. DESIGN WIND LOADS
FOR EXTERIOR GLAZING NOT PART OF A LABELED ASSEMBLY
SHALL BE PERMITTED TO BE DETERMINED IN ACCORDANCE WITH
CHAPTER 24 OF THE INTERNATIONAL BUILDING CODE.
R609.4 GARAGE DOORS.
GARAGE DOORS SHALL BE TESTED IN ACCORDANCE WITH EITHER
ASTM E330 OR ANSI/DASMA 108, AND SHALL MEET THE
ACCEPTANCE CRITERIA OF ANSI/DASMA 108.
CHAPTER 7 :: INTERIOR COVERING
R702.1 GENERAL.
INTERIOR COVERINGS OR WALL FINISHES SHALL BE INSTALLED IN
ACCORDANCE WITH THIS CHAPTER AND TABLE R702.1(1), TABLE
R702.1(2), TABLE R702.1(3) AND TABLE R702.3.5. INTERIOR
MASONRY VENEER SHALL COMPLY WITH THE REQUIREMENTS OF
SECTION R703.7.1 FOR SUPPORT AND SECTION R703.7.4 FOR
ANCHORAGE, EXCEPT AN AIRSPACE IS NOT REQUIRED. INTERIOR
FINISHES AND MATERIALS SHALL CONFORM TO THE FLAME
SPREAD AND SMOKE DEVELOPMENT REQUIREMENTS OF SECTION
R302.9.
SEE SECTIONS 702.2 THROUGH 702.7 FOR FURTHER
SPECIFICATIONS.
SECTION R703 EXTERIOR COVERING
R703.1 GENERAL.
EXTERIOR WALLS SHALL PROVIDE THE BUILDING WITH A
WEATHER-RESISTANT EXTERIOR WALL ENVELOPE. THE EXTERIOR
WALL ENVELOPE SHALL INCLUDE FLASHING AS DESCRIBED IN
SECTION R703.4.
R703.2 WATER-RESISTIVE BARRIER.
ONE LAYER OF NO. 15 ASPHALT FELT, FREE FROM HOLES AND
BREAKS, COMPLYING WITH ASTM D226 FOR TYPE 1 FELT OR
OTHER APPROVED WATER-RESISTIVE BARRIER SHALL BE APPLIED
OVER STUDS OR SHEATHING OF ALL EXTERIOR WALLS. NO. 15
ASPHALT FELT SHALL BE APPLIED HORIZONTALLY, WITH THE
UPPER LAYER LAPPED OVER THE LOWER LAYER NOT LESS THAN 2
INCHES
(51 MM). WHERE JOINTS OCCUR, FELT SHALL BE LAPPED NOT LESS
THAN 6 INCHES (152 MM). OTHER APPROVED MATERIALS SHALL BE
INSTALLED IN ACCORDANCE WITH THE WATER-RESISTIVE BARRIER
MANUFACTURER'S INSTALLATION INSTRUCTIONS. NO. 15 ASPHALT
FELT OR OTHER APPROVED WATER-RESISTIVE BARRIER MATERIAL
SHALL BE CONTINUOUS TO THE TOP OF WALLS AND TERMINATED
AT PENETRATIONS AND BUILDING APPENDAGES IN A MANNER TO
MEET THE REQUIREMENTS OF THE EXTERIOR WALL ENVELOPE AS
DESCRIBED IN SECTION R703.1.
R703.3.3 FASTENERS.
EXTERIOR WALL COVERINGS AND ROOF OVERHANG SOFFITS
SHALL BE SECURELY FASTENED WITH ALUMINUM, GALVANIZED,
STAINLESS STEEL OR RUST-PREVENTATIVE COATED NAILS OR
STAPLES IN ACCORDANCE WITH TABLE R703.3(1) OR WITH OTHER
APPROVED CORROSION- RESISTANT FASTENERS IN ACCORDANCE
WITH THE WALL COVERING MANUFACTURER’S INSTALLATION
INSTRUCTIONS. NAILS AND STAPLES SHALL COMPLY WITH ASTM
F1667. NAILS SHALL BE T-HEAD, MODIFIED ROUND HEAD, OR
ROUND HEAD WITH SMOOTH OR DEFORMED SHANKS. STAPLES
SHALL HAVE A MINIMUM CROWN WIDTH OF 7/16 INCH (11.1 MM)
OUTSIDE DIAMETER AND BE MANUFACTURED OF MINIMUM 16-GAGE
WIRE. WHERE FIBERBOARD, GYPSUM, OR FOAM PLASTIC
SHEATHING BACKING IS USED, NAILS OR STAPLES SHALL BE
DRIVEN INTO THE STUDS. WHERE WOOD OR WOOD STRUCTURAL
PANEL SHEATHING IS USED, FASTENERS SHALL BE DRIVEN INTO
STUDS UNLESS OTHERWISE PERMITTED TO BE DRIVEN INTO
SHEATHING IN ACCORDANCE WITH EITHER THE SIDING
MANUFACTURER’S INSTALLATION INSTRUCTIONS OR TABLE
R703.3.2.
R703.4 FLASHING.
APPROVED CORROSION-RESISTANT FLASHING SHALL
BE APPLIED SHINGLE-FASHION IN A MANNER TO PREVENT ENTRY
OF WATER INTO THE WALL CAVITY OR PENETRATION OF WATER TO
THE BUILDING STRUCTURAL FRAMING COMPONENTS.
SELF-ADHERED MEMBRANES USED AS FLASHING SHALL COMPLY
WITH AAMA 711. FLUID-APPLIED MEMBRANES USED AS FLASHING IN
EXTERIOR WALLS SHALL COMPLY WITH AAMA 714. THE FLASHING
SHALL EXTEND TO THE SURFACE OF THE EXTERIOR WALL FINISH.
APPROVED CORROSION-RESISTANT FLASHINGS SHALL BE
INSTALLED AT THE FOLLOWING LOCATIONS:
1.EXTERIOR WINDOW AND DOOR OPENINGS. FLASHING AT
EXTERIOR WINDOW AND DOOR OPENINGS SHALL EXTEND TO THE
SURFACE OF THE EXTERIOR WALL FINISH OR TO THE
WATER-RESISTIVE BARRIER COMPLYING WITH SECTION 703.2 FOR
SUBSEQUENT DRAINAGE. MECHANICALLY ATTACHED FLEXIBLE
FLASHINGS SHALL COMPLY WITH AAMA 712. FLASHING AT
EXTERIOR WINDOW AND DOOR OPENINGS SHALL BE INSTALLED IN
ACCORDANCE WITH ONE OR MORE OF THE FOLLOWING:
REFER TO SECTION 1.1 THROUGH 1.3 FOR FURTHER
SPECIFICATIONS.
REFER TO THE IRC FOR FURTHER INFORMATION ON THE
FOLLOWING AREAS:
-R703.5 WOOD, HARDBOARD AND WOOD STRUCTURAL PANEL
SIDING.
-R703.6 WOOD SHAKES AND SHINGLES.
-R703.7 EXTERIOR PLASTER.
-R703.8 ANCHORED STONE AND MASONRY VENEER, GENERAL.
-R703.9 EXTERIOR INSULATION AND FINISH SYSTEM (EIFS)/EIFS
WITH DRAINAGE.
-R703.10 FIBER CEMENT SIDING.
-R703.11 VINYL SIDING.
-R703.12 ADHERED MASONRY VENEER INSTALLATION.
-R703.13 INSULATED VINYL SIDING.
-R703.14 POLYPROPYLENE SIDING.
-R703.15 CLADDING ATTACHMENT OVER FOAM SHEATHING TO
WOOD FRAMING.
-R703.16 CLADDING ATTACHMENT OVER FOAM SHEATHING TO
COLD-FORMED STEEL FRAMING.
-R703.17 CLADDING ATTACHMENT OVER FOAM SHEATHING TO
MASONRY OR CONCRETE WALL CONSTRUCTION.
SECTION R806
ROOF VENTILATION
R806.1 VENTILATION REQUIRED. ENCLOSED ATTICS AND
ENCLOSED RAFTER SPACES FORMED WHERE CEILINGS
ARE APPLIED DIRECTLY TO THE UNDERSIDE OF ROOF
RAFTERS SHALL HAVE CROSS VENTILATION FOR EACH
SEPARATE SPACE BY VENTILATING OPENINGS
PROTECTED AGAINST THE ENTRANCE OF RAIN OR SNOW.
VENTILATION OPENINGS SHALL HAVE A LEAST
DIMENSION OF 1/16 INCH (1.6 MM) MINIMUM AND 1/4 INCH
(6.4 MM) MAXIMUM. VENTILATION OPENINGS HAVING A
LEAST DIMENSION LARGER THAN 1/4 INCH (6.4 MM) SHALL
BE PROVIDED WITH CORROSION-RESISTANT WIRE CLOTH
SCREENING, HARDWARE CLOTH PERFORATED VINYL OR
SIMILAR MATERIAL WITH OPENINGS HAVING A LEAST
DIMENSION OF 1/16 INCH (1.6 MM) MINIMUM AND 1/4 INCH
(6.4 MM) MAXIMUM. OPENINGS IN ROOF FRAMING
MEMBERS SHALL CONFORM TO THE REQUIREMENTS OF
SECTION R802.7. REQUIRED VENTILATION OPENINGS
SHALL OPEN DIRECTLY TO THE OUTSIDE AIR AND SHALL
BE PROTECTED TO PREVENT THE ENTRY OF BIRDS,
RODENTS, SNAKES, AND OTHER SIMILAR CREATURES.
R806.2 MINIMUM VENT AREA.
THE MINIMUM NET FREE VENTILATING AREA SHALL BE
1/150 OF THE AREA OF THE VENTED SPACE.
NOTE: SEE SECTION 806.2 FOR EXCEPTION
R806.3 VENT AND INSULATION CLEARANCE.
WHERE EAVE OR CORNICE VENTS ARE INSTALLED,
BLOCKING, BRIDGING, AND INSULATION SHALL NOT
BLOCK THE FREE FLOW OF AIR. NOT LESS THAN A 1-INCH
(25 MM) SPACE SHALL BE PROVIDED BETWEEN THE
INSULATION AND THE ROOF SHEATHING AND AT THE
LOCATION OF THE VENT.
R806.4 INSTALLATION AND WEATHER PROTECTION.
VENTILATORS SHALL BE INSTALLED IN ACCORDANCE
WITH MANUFACTURER’S INSTRUCTIONS. INSTALLATION
OF VENTILATORS IN ROOF SYSTEMS SHALL BE IN
ACCORDANCE WITH THE REQUIREMENTS OF SECTION
R903. INSTALLATION OF VENTILATORS IN WALL SYSTEMS
SHALL BE IN ACCORDANCE WITH THE REQUIREMENTS OF
SECTION R703.1.
R806.5 UNVENTED ATTIC AND UNVENTED ENCLOSED
RAFTER
ASSEMBLIES.
UNVENTED ATTICS AND UNVENTED ENCLOSED ROOF
FRAMING ASSEMBLIES CREATED BY CEILINGS THAT ARE
APPLIED DIRECTLY TO THE UNDERSIDE OF THE ROOF
FRAMING MEMBERS AND STRUCTURAL ROOF SHEATHING
APPLIED DIRECTLY TO THE TOP OF THE ROOF FRAMING
MEMBERS/RAFTERS, SHALL BE PERMITTED WHERE ALL
THE FOLLOWING CONDITIONS ARE MET:
SEE CONDITIONS 806.5 (1 THROUGH 5)
SECTION R807 ATTIC ACCESS
R807.1 ATTIC ACCESS.
BUILDINGS WITH COMBUSTIBLE CEILING OR ROOF
CONSTRUCTION SHALL HAVE AN ATTIC ACCESS OPENING
TO ATTIC AREAS THAT HAVE A VERTICAL HEIGHT OF 30
INCHES (762 MM) OR GREATER OVER AN AREA OF NOT
LESS THAN 30 SQUARE FEET (2.8 M2). THE VERTICAL
HEIGHT SHALL BE MEASURED FROM THE TOP OF THE
CEILING FRAMING MEMBERS TO THE UNDERSIDE OF THE
ROOF FRAMING MEMBERS.
THE ROUGH-FRAMED OPENING SHALL BE NOT LESS THAN
22 INCHES BY 30 INCHES (559 MM BY 762 MM) AND SHALL
BE LOCATED IN A HALLWAY OR OTHER LOCATION WITH
READY ACCESS. WHERE LOCATED IN A WALL, THE
OPENING SHALL BE NOT LESS THAN 22 INCHES WIDE BY
30 INCHES HIGH (559 MM WIDE BY 762 MM HIGH). WHERE
THE ACCESS IS LOCATED IN A CEILING, MINIMUM
UNOBSTRUCTED HEADROOM IN THE ATTIC SPACE SHALL
BE 30 INCHES (762 MM) AT SOME POINT ABOVE THE
ACCESS MEASURED VERTICALLY FROM THE BOTTOM OF
CEILING FRAMING MEMBERS. SEE SECTION M1305.1.3
FOR ACCESS REQUIREMENTS WHERE MECHANICAL
EQUIPMENT IS LOCATED IN ATTICS.
CHAPTER 9 :: ROOF ASSEMBLIES
SECTION R901 GENERAL
R901.1 SCOPE. THE PROVISIONS OF THIS CHAPTER SHALL
GOVERN THE DESIGN, MATERIALS, CONSTRUCTION AND
QUALITY OF ROOF ASSEMBLIES.
CHAPTER 10 :: CHIMNEYS &
FIREPLACES
R1001.1 GENERAL.
MASONRY FIREPLACES SHALL BE CONSTRUCTED IN
ACCORDANCE WITH THIS SECTION AND THE APPLICABLE
PROVISIONS OF CHAPTERS 3 AND 4.
(RESIDENTIAL LIVING AREAS, LIVE LOAD = 40psf, L/ =360)
FLOOR JOIST SPANS FOR SOUTHERN PINE SPECIES
SIZE
2 x 12
NOTES:
2 x 8
2 x 10
2 x 6 8-616.0
19.2
19.2
24.0
12.0
24.0
16.0
12.0
24.0
16.0
19.2
19.2
24.0
16.0
12.0
11-8
13-9
12-4
17-5
10-5
15-1
8-10
14-9
12-10
9-10
7-9
7-0
10-10
12-6
VISUALLY GRADED #2
(MAXIMUM FLOOR JOIST SPANS)
SOUTHERN PINE
DEAD LOAD = 20psf
SPACING
12.0
(INCHES)
9-10
(FT. - IN.)
FLOOR JOIST SPANS
The above tables are based on the IRC 2018 TABLE R502.3.1(2)
, L/ =180
BETWEEN BRACING)
SPANS
RAFTER SPANS
(FT. - IN.)
12-11
11-2
10-2
DEAD LOAD = 10psf
(INCHES)
12.0
16.0
19.2
SPACING
RAFTER SPANS FOR SOUTHERN PINE SPECIES
(MAXIMUM RAFTER SPANS
14-2
12-11
16-4
9-2
15-4
13-9
19-5
16-10
11-7
18-1
16-2
22-10
19-10
16.0
19.2
12.0
24.0
19.2
24.0
12.0
16.0
24.0
19.2
24.0
16.0
12.0
2 x 6
2 x 8
2 x 12
2 x 10
LIVE LOAD=30psf
SIZE
(UNINHABITABLE ATTICS WITH LIMITED STORAGE,
CEILING JOIST SPANS FOR SOUTHERN PINE SPECIES
SIZE
REFER TO THE INTERNATIONAL RESIDENTIAL CODE, SPAN TABLES.***
2 x 10
NOTES:
2 x 6
2 x 8
2 x 4 8-016.0
19.2
19.2
24.0
12.0
24.0
16.0
12.0
24.0
16.0
19.2
19.2
24.0
16.0
12.0
13-11
16-6
14-9
20-11
12-6
18-1
9-10
17-7
15-3
11-0
7-4
6-7
12-0
13-11
VISUALLY GRADED #2
(MAXIMUM CEILING JOIST SPANS)
SOUTHERN PINE
***IF HABITABLE ATTIC SPACE IS DESIRED,
DEAD LOAD = 10psf )
SPACING
12.0
(INCHES)
9-3
(FT. - IN.)
CEILING JOIST SPANS
NOTES:
The above tables are based on the IRC 2018 TABLE R802.5.1(2)
The above tables are based on the IRC 2018 TABLE R802.4.1(3)
LIVE LOAD = 20psf, L/ =240)
25
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R
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a
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z
a
t
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,
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8
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N4
TABLE N1102.1.2 (R402.1.2)
INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa
CRAWL
CLIMATE
R-VALUE & DEPTH WALL
R-VALUE
1 NR 0.75 0.25 30 13 3/4 13 0 0 0
2 0.40 0.65 0.25 38 13 4/6 13 0 0 0
3 0.55 0.25 38 20 or 13 + 5h 8/13 19 5/13f 0 5/13
4 except
5 and
6 0.55 NR 49 20 + 5 or 13 + 10h 15/20 30g 15/19 10, 4 ft 15/19
7 and 8 0.55 NR 49 20 + 5 or 13 + 10h 19/21 38g 15/19 10, 4 ft 15/19
For SI: 1 foot = 304.8 mm.
a. R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which is less than the label or design thickness of the
insulation, the installed R-value of the insulation shall not be less than the R-value specified in the table.
b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
Exception: Skylights may be excluded from glazed fenestration SHGC requirements in Climate Zones 1 through 3 where the SHGC for such skylights does
not exceed 0.30.
c. “15/19” means R-15 continuous insulation on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. “15/19” shall
be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the home.
“10/13” means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall.
d. R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Zones 1
through 3 for heated slabs.
e. There are no SHGC requirements in the Marine Zone.
f. Basement wall insulation is not required in warm-humid locations as defined by Figure N1101.10 and Table N1101.10.
g. Or insulation sufficient to fill the framing cavity, R-19 minimum.
h. The first value is cavity insulation, the second value is continuous insulation, so “13+5” means R-13 cavity insulation plus R-5 continuous insulation.
i. The second R-value applies when more than half the insulation is on the interior of the mass wall.
TABLE N1102.1.4 (R402.1.4)
EQUIVALENT U-FACTORSa
CLIMATE
U-FACTOR U-FACTOR
1 0.50 0.75 0.035 0.084 0.197 0.064 0.360 0.477
2 0.40 0.65 0.030 0.084 0.165 0.064 0.360 0.477
3 0.35 0.55 0.030 0.060 0.098 0.047 0.091c 0.136
4 except Marine 0.35 0.55 0.026 0.060 0.098 0.047 0.059 0.065
5 and Marine 4 0.32 0.55 0.026 0.060 0.082 0.033 0.050 0.055
6 0.32 0.55 0.026 0.045 0.060 0.033 0.050 0.055
7 and 8 0.32 0.55 0.026 0.045 0.057 0.028 0.050 0.055
a. Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source.
b. When more than half the insulation is on the interior, the mass wall U-factors shall be a maximum of 0.17 in Zone 1, 0.14 in Zone 2, 0.12 in Zone 3, 0.087 in
Zone 4 except Marine, 0.065 in Zone 5 and Marine 4, and 0.057 in Zones 6 through 8.
FENESTRATION SKYLIGHT CEILING FRAME
ZONE U-FACTOR U-FACTOR U-FACTOR WALL MASS WALL
U-FACTOR
FLOOR BASEMENT
U-FACTORb U-FACTOR WALL
CRAWL
SPACE WALL
FENESTRATION
ZONE U-FACTORb
SKYLIGHT
b
GLAZED
FENESTRATION CEILING WOOD
U-FACTOR SHGCb, e R-VALUE FRAME WALL
MASS
WALL FLOOR BASEMENTc
R-VALUE R-VALUEi R-VALUE
WALL
SLABd
R-VALUE SPACEc
Marine 0.55 0.40 49 20 or 13 + 5h 8/13 19 10 /13 10, 2 ft 10/13
Marine 4 0.30 0.55 NR 49 20 or 13 + 5h 13/17 30g 15/19 10, 2 ft 15/19
c. Basement wall U-factor of 0.360 in warm-humid locations as defined by Figure N1101.10 (R301.1) and Table N1101.10 (R301.1).
0.32
0.32
0.30
0.30
2018 INTERNATIONAL RESIDENTIAL CODE ®
TABLE N1102.4.1.1 (R402.4.1.1)
AIR BARRIER AND INSULATION INSTALLATION (a)
COMPONENT AIR BARRIER CRITERIA INSULATION INSTALLATION
CRITERIA
General requirements
A continuous air barrier shall be
installed in the building envelope.
The exterior thermal envelope
contains a continuous air barrier.
Breaks or joints in the air barrier
shall be sealed.
Air-permeable insulation shall not be
used as a sealing material.
Ceiling/attic
The air barrier in any dropped
ceiling or soffit shall be aligned with
the insulation and any gaps in the air
barrier sealed.
Access openings, drop down stairs
or knee wall doors to unconditioned
attic spaces shall be sealed.
The insulation in any dropped
ceiling/soffit shall be aligned with the air
barrier.
Walls
The junction of the foundation and
sill plate shall be sealed.
The junction of the top plate and the
top of exterior walls shall be sealed.
Knee walls shall be sealed.
Cavities within corners and headers of
frame walls shall be insulated by
completely filling the cavity with a
material having a thermal resistance of
not less than R-3 per inch.
Exterior thermal envelope insulation for
framed walls shall be installed in
substantial contact and in continuous
alignment with the air barrier.
Windows, skylights and
doors
The space between
framing and skylights,
and framing the jambs of windows
and doors, shall be sealed.
Rim joists Rim joists shall include the air
barrier.Rim joists shall be insulated.
Floors (including above
garage and
cantilevered floors) and
floors above
garages.
The air barrier shall be installed at
any exposed edge of insulation.
Floor framing cavity insulation shall be
installed to maintain permanent contact
with the underside of subfloor decking.
Alternatively floor framing cavity
insulation shall be in
contact with the top side of sheathing, or
continuous insulation installed on the
underside of floor framing; and
extending from the bottom to the top of
all perimeter floor framing members.
Crawl space walls
Exposed earth in unvented crawl
spaces shall be covered with a Class
I vapor retarder with overlapping
joints taped.
Crawl space insulation,where provided
instead of floor insulation,
shall be permanently attached to the
walls.
Shafts, penetrations
Duct shafts, utility penetrations, and
flue shafts opening to exterior or
unconditioned space shall be
sealed.
Narrow cavities
Batts to be installed in narrow cavities
shall be cut to fit, or narrow cavities shall
be filled with insulation that on
installation readily conforms to the
(a) Inspection of log walls shall be in accordance with the provisions of ICC 400.
available cavity space.
Garage separation
Air sealing shall be provided
between the garage and conditioned
spaces.
Recessed lighting
Recessed light fixtures installed in
the building thermal envelope shall
be sealed to the finished surface.
Recessed light fixtures installed in the
building thermal envelope shall be air
tight and IC rated.
Plumbing and wiring
In exterior walls, batt insulation shall be
cut neatly to fit around wiring and
plumbing or insulation
that on installation, readily conforms to
available space, shall extend behind
piping and wiring.
Shower/tub on exterior
wall
The air barrier installed at exterior
walls adjacent to showers and tubs
shall separate the wall from the
shower or tub.
Exterior walls adjacent to showers and
tubs shall be insulated.
Electrical/phone box on
exterior walls
The air barrier shall be installed
behind electrical and
communication boxes.
Alternatively, air-sealed boxes
shall be installed.
HVAC register boots
HVAC register boots that penetrate
building thermal envelope shall be
sealed to the subfloor or drywall.
Concealed sprinklers
Where required to be sealed,
concealed fire sprinklers shall only
be sealed in a manner that is
recommended by the manufacturer.
Caulking or other adhesive sealants
shall not be used to fill voids
between fire sprinkler cover plates
and walls or ceilings.
25
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