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Chapter 5 — FLOORS

Section R507

California Residential Code (Title 24, Part 2.5) · 2019 edition · updated 2026-09-12 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

R507.1 Decks.

Wood-framed decks shall be in accordance with this section. For decks using materials and conditions not prescribed in this section, 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 preservativetreated 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 this section.

R507.2.2.1 Labeling. Plastic composite deck boards and stair treads, or their packaging, shall bear a label that indicates compliance with ASTM D7032 and includes the allowable load and maximum allowable span determined in accordance with ASTM D7032. Plastic or composite handrails and guards, or their packaging, shall bear a label that indicates compliance with ASTM D7032 and includes the maximum allowable span determined in accordance with ASTM D7032.

R507.2.2.2 Flame spread index. Plastic composite deck boards, stair treads, guards, and handrails shall exhibit a flame spread index not exceeding 200 when tested in accordance with ASTM E84 or UL 723 with the test specimen remaining in place during the test.

Exception: Plastic composites determined to be noncombustible.

R507.2.2.3 Decay resistance. Plastic composite deck boards, stair treads, guards and handrails containing wood, cellulosic or other biodegradable materials shall be decay resistant in accordance with ASTM D7032.

R507.2.2.4 Termite resistance. Where required by Section 318, plastic composite deck boards, stair treads, guards and handrails containing wood, cellulosic or other biodegradable materials shall be termite resistant in accordance with ASTM D7032.

216 2019 CALIFORNIA RESIDENTIAL CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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R507.2.2.5 Installation of plastic composites. Plastic composite deck boards, stair treads, guards and handrails shall be installed in accordance with this code and the manufacturer’s instructions.

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.

R507.2.4 Flashing. Flashing shall be corrosion-resistant metal of nominal thickness not less than 0.019 inch (0.48 mm) or approved nonmetallic material that is compatible with the substrate of the structure and the decking materials.

R507.2.5 Alternate materials. Alternative materials, including glass and metals, shall be permitted.

R507.3 Footings.

Decks shall be supported on concrete footings or other approved structural systems designed to accommodate all loads in accordance with Section R301. Deck footings shall be sized to carry the imposed loads from the deck structure to the ground as shown in Figure R507.3. The footing depth shall be in accordance with Section R403.1.4.

Exception: Free-standing decks consisting of joists directly supported on grade over their entire length.

R507.3.1 Minimum size. The minimum size of concrete footings shall be in accordance with Table R507.3.1, based on the tributary area and allowable soil-bearing pressure in accordance with Table R401.4.1.

R507.3.2 Minimum depth. Deck footings shall extend below the frost line specified in Table R301.2(1) in accordance with Section R403.1.4.1.

Exceptions:

  1. Free-standing decks that meet all of the following criteria:

1.1. The joists bear directly on precast concrete pier blocks at grade without support by beams or posts.

1.2. The area of the deck does not exceed 200 square feet (18.9 m 2 ).

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1.3. The walking surface is not more than 20 inches (616 mm) above grade at any point within 36 inches (914 mm) measured horizontally from the edge.

  1. Free-standing decks need not be provided with footings that extend below the frost line.

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.

TABLE R507.4 DECK POST HEIGHT a

DECK POST SIZE MAXIMUM HEIGHTa, b
(feet-inches)
4 4 6-9c
4 6 8
6 6 14
8 8 14

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm,

1 pound per square foot = 0.0479 kPa. a. Measured to the underside of the beam. b. Based on 40 psf live load. c. The maximum permitted height is 8 feet for one-ply and two-ply beams.

The maximum permitted height for three-ply beams on post cap is 6 feet 9 inches.

R507.4.1 Deck post to deck 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.

Exception: Where expansive, compressible, shifting or other questionable soils are present, surrounding soils shall not be relied on for lateral support.

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 0.128-inch) nails minimum at 16 inches (406 mm) on center along each edge. Beams shall be

TABLE R507.2.3 FASTENER AND CONNECTOR SPECIFICATIONS FOR DECKS a, b

ITEM MATERIAL MINIMUM FINISH/COATING ALTERNATE FINISH/COATINGe
Nails and timber rivets In accordance with
ASTM F1667		 Hot-dipped galvanized per ASTM A153 Stainless steel, silicon bronze or
copper
Boltsc
Lag screwsd
(including nuts and
washers)		 In accordance with
ASTM A307 (bolts),
ASTM A563 (nuts),
ASTM F844 (washers)		 Hot-dipped galvanized per ASTM A153, Class C
(Class D for3/8-inch diameter and less) or mechani-
cally galvanized per ASTM B695, Class 55 or 410
stainless steel		 Stainless steel, silicon bronze or
copper
Metal connectors Per manufacturer’s
specification		 ASTM A653 type G185 zinc coated galvanized
steel or post hot-dipped galvanized per ASTM
A123 providing a minimum average coating
weight of 2.0 oz./ft2 (total both sides)		 Stainless steel

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a. Equivalent materials, coatings and finishes shall be permitted. b. Fasteners and connectors exposed to salt water or located within 300 feet of a salt water shoreline shall be stainless steel. c. Holes for bolts shall be drilled a minimum 1 /32 inch and a maximum 1 /16 inch larger than the bolt. d. Lag screws 1 /2 inch and larger shall be predrilled to avoid wood splitting per the National Design Specification (NDS) for Wood Construction. e. Stainless-steel-driven fasteners shall be in accordance with ASTM F1667.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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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.

R507.5.1 Deck beam bearing. The ends of beams shall have not less than 1 1 /2 inches (38 mm) of bearing on wood or metal and not less than 3 inches (76 mm) of bearing on concrete or masonry for the entire width of the beam. Where multiple-span beams bear on intermediate posts, each ply must have full bearing on the post in accordance with Figures R507.5.1(1) and R507.5.1(2).

R507.5.2 Deck beam connection to supports. Deck beams shall be attached to supports in a manner capable of transferring vertical loads and resisting horizontal displacement. Deck beam connections to wood posts shall be in accordance with Figures R507.5.1(1) and R507.5.1(2). Manufactured post-to-beam connectors shall be sized for the post and beam sizes. Bolts shall have washers under the head and nut.

R507.6 Deck joists.

Maximum allowable spans for wood deck joists, as shown in Figure R507.6, shall be in accordance with Table R507.6. The maximum joist spacing shall be limited by the decking materials in accordance with Table R507.7. The maximum joist cantilever shall be limited to one-fourth of the joist span or the maximum cantilever length specified in Table R507.6, whichever is less.

R507.6.1 Deck joist bearing. The ends of joists shall have not less than 1 1 /2 inches (38 mm) of bearing on wood or metal and not less than 3 inches (76 mm) of bearing on concrete or masonry over its entire width. Joists bearing on top of a multiple-ply beam or ledger shall be fastened in accordance with Table R602.3(1). Joists bearing on top of a single-ply beam or ledger shall be attached by a mechanical connector. Joist framing into the side of a beam or ledger board shall be supported by approved joist hangers.

R507.6.2 Deck joist lateral restraint. Joist ends and bearing locations shall be provided with lateral resistance to prevent rotation. Where lateral restraint is provided by joist hangers or blocking between joists, their depth shall equal not less than 60 percent of the joist depth. Where lateral restraint is provided by rim joists, they shall be secured to the end of each joist with not fewer than three 10d (3-inch by 0.128-inch) (76 mm by 3.3 mm) nails or three No. 10x 3-inch (76 mm) long wood screws.

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.

218 2019 CALIFORNIA RESIDENTIAL CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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a, c, d (psf) LOAD BEARING VALUE OF SOILS 3000e Thickness (inches) 6 6 6 6 6 6 6 7 6 6 6 6 6 6 7 8 6 6 6 6 6 7 8 9 6 6 6 6 7 8 9 9
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 3000e Diameter of a
round footing
(inches)		 14 14 14 16 17 19 21 22 14 14 15 17 19 21 23 24 14 14 16 19 21 23 24 26 14 14 17 20 22 24 26 28
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 3000e Side of a
square footing
(inches)		 12 12 12 14 15 17 18 20 12 12 13 15 17 19 20 21 12 12 14 16 18 20 22 23 12 12 15 18 20 21 23 25
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 2500e Thickness
(inches)		 6 6 6 6 6 6 7 8 6 6 6 6 6 7 8 9 6 6 6 6 7 8 9 10 6 6 6 7 8 9 10 11
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 2500e Diameter of a
round footing
(inches)		 14 14 15 17 19 21 23 24 14 14 16 19 21 23 25 27 14 14 18 20 23 25 27 29 14 15 19 22 24 27 29 31
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 2500e Side of a
square footing
(inches)		 12 12 13 15 17 19 20 21 12 12 14 17 19 20 22 24 12 13 16 18 20 22 24 25 12 14 17 19 21 24 25 27
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 2000e Thickness
(inches)		 6 6 6 6 6 7 8 9 6 6 6 6 7 8 9 10 6 6 6 7 8 9 10 11 6 6 6 8 9 10 11 12
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 2000e Diameter of a
round footing
(inches)		 14 14 17 19 21 23 25 27 14 15 18 21 23 26 28 30 14 16 20 23 25 28 30 32 14 17 21 24 27 30 32 34
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 2000e Side of a
square footing
(inches)		 12 12 15 17 19 21 22 24 12 13 16 19 21 23 25 26 12 14 17 20 22 25 27 28 12 15 19 21 24 26 28 30
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 1500e Thickness
(inches)		 6 6 6 7 8 9 10 11 6 6 6 8 9 10 11 12 6 6 7 9 10 11 12 13 6 6 8 9 11 12 13 15
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 1500e Diameter of a
round footing
(inches)		 14 16 19 22 25 27 29 31 14 17 21 24 27 30 32 34 14 19 23 26 29 32 35 37 14 20 24 28 31 34 37 40
LOAD BEARING VALUE OF SOILSa, c, d (psf)
 1500e Side of a
square footing
(inches)		 12 14 17 20 22 24 26 28 12 15 19 21 24 26 28 30 12 16 20 23 26 28 31 33 12 18 21 25 28 30 33 35
TRIBUTARY
AREA
(sq. ft.)		 TRIBUTARY
AREA
(sq. ft.)		 TRIBUTARY
AREA
(sq. ft.)		 20 40 60 80 100 120 140 160 20 40 60 80 100 120 140 160 20 40 60 80 100 120 140 160 20 40 60 80 100 120 140 160
LIVE OR
GROUND
SNOW
LOADb
(psf)		 LIVE OR
GROUND
SNOW
LOADb
(psf)		 LIVE OR
GROUND
SNOW
LOADb
(psf)		 40 40 40 40 40 40 40 40 50 50 50 50 50 50 50 50 60 60 60 60 60 60 60 60 70 70 70 70 70 70 70 70

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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TABLE R507.5 DECK BEAM SPAN LENGTHS a, b, g (feet - inches)

SPECIESc SIZEd DECK JOIST SPAN LESS THAN OR EQUAL TO:
(feet)
SPECIESc SIZEd 6 8 10 12 14 16 18
Southern pine 1 – 2 6 4-11 4-0 3-7 3-3 3-0 2-10 2-8
Southern pine 1 – 2 8 5-11 5-1 4-7 4-2 2-10 3-7 3-5
Southern pine 1 – 2 10 7-0 6-0 5-5 4-11 4-7 4-3 4-0
Southern pine 1 – 2 12 8-3 7-1 6-4 5-10 5-5 5-0 4-9
Southern pine 2 – 2 6 6-11 5-11 5-4 4-10 4-6 4-3 4-0
Southern pine 2 – 2 8 8-9 7-7 6-9 6-2 5-9 5-4 5-0
Southern pine 2 – 2 10 10-4 9-0 8-0 7-4 6-9 6-4 6-0
Southern pine 2 – 2 12 12-2 10-7 9-5 8-7 8-0 7-6 7-0
Southern pine 3 – 2 6 8-2 7-5 6-8 6-1 5-8 5-3 5-0
Southern pine 3 – 2 8 10-10 9-6 8-6 7-9 7-2 6-8 6-4
Southern pine 3 – 2 10 13-0 11-3 10-0 9-2 8-6 7-11 7-6
Southern pine 3 – 2 12 15-3 13-3 11-10 10-9 10-0 9-4 8-10
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 6 or 2 – 2 x 6 5-5 4-8 4-2 3-10 3-6 3-1 2-9
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 8 or 2 – 2 8 6-10 5-11 5-4 4-10 4-6 4-1 3-8
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 10 or 2 – 2 10 8-4 7-3 6-6 5-11 5-6 5-1 4-8
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 12 or 2 – 2 12 9-8 8-5 7-6 6-10 6-4 5-11 5-7
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 4 6 6-5 5-6 4-11 4-6 4-2 3-11 3-8
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 4 8 8-5 7-3 6-6 5-11 5-6 5-2 4-10
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 4 10 9-11 8-7 7-8 7-0 6-6 6-1 5-8
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 4 12 11-5 9-11 8-10 8-1 7-6 7-0 6-7
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 – 2 6 7-4 6-8 6-0 5-6 5-1 4-9 4-6
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 – 2 8 9-8 8-6 7-7 6-11 6-5 6-0 5-8
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 – 2 10 12-0 10-5 9-4 8-6 7-10 7-4 6-11
Douglas fir-larche,
hem-fire,
spruce-pine-fire,
redwood,
western cedars,
ponderosa pinef,
red pinef		 3 – 2 12 13-11 12-1 10-9 9-10 9-1 8-6 8-1

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 pound = 0.454 kg. a. Ground snow load, live load = 40 psf, dead load = 10 psf, L/ = 360 at main span, L/ = 180 at cantilever with a 220-pound point load applied at the end. b. Beams supporting deck joists from one side only. c. No. 2 grade, wet service factor. d. Beam depth shall be greater than or equal to depth of joists with a flush beam condition. e. Includes incising factor. f. Northern species. Incising factor not included. g. Beam cantilevers are limited to the adjacent beam’s span divided by 4.

220 2019 CALIFORNIA RESIDENTIAL CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

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222 2019 CALIFORNIA RESIDENTIAL CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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TABLE R507.6 DECK JOIST SPANS FOR COMMON LUMBER SPECIES (ft. - in.)

SPECIESa SIZE ALLOWABLE JOIST SPANb MAXIMUM CANTILEVERc, f
SPECIESa SIZE SPACING OF DECK JOISTS
(inches)		 SPACING OF DECK JOISTS
(inches)		 SPACING OF DECK JOISTS
(inches)		 SPACING
OF DECK JOISTS WITH CANTILEVERSc
(inches)		 SPACING
OF DECK JOISTS WITH CANTILEVERSc
(inches)		 SPACING
OF DECK JOISTS WITH CANTILEVERSc
(inches)
SPECIESa 12 16 24 12 16 24
Southern pine 2 6 9-11 9-0 7-7 1-3 1-4 1-6
Southern pine 2 8 13-1 11-10 9-8 2-1 2-3 2-5
Southern pine 2 10 16-2 14-0 11-5 3-4 3-6 2-10
Southern pine 2 12 18-0 16-6 13-6 4-6 4-2 3-4
Douglas fir-larchd,
hem-fird
spruce-pine-fird,		 2 6 9-6 8-8 7-2 1-2 1-3 1-5
Douglas fir-larchd,
hem-fird
spruce-pine-fird,		 2 8 12-6 11-1 9-1 1-11 2-1 2-3
Douglas fir-larchd,
hem-fird
spruce-pine-fird,		 2 10 15-8 13-7 11-1 3-1 3-5 2-9
Douglas fir-larchd,
hem-fird
spruce-pine-fird,		 2 12 18-0 15-9 12-10 4-6 3-11 3-3
Redwood,
western cedars,
ponderosa pinee,
red pinee		 2 6 8-10 8-0 7-0 1-0 1-1 1-2
Redwood,
western cedars,
ponderosa pinee,
red pinee		 2 8 11-8 10-7 8-8 1-8 1-10 2-0
Redwood,
western cedars,
ponderosa pinee,
red pinee		 2 10 14-11 13-0 10-7 2-8 2-10 2-8
Redwood,
western cedars,
ponderosa pinee,
red pinee		 2 12 17-5 15-1 12-4 3-10 3-9 3-1

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 pound = 0.454 kg. a. No. 2 grade with wet service factor. b. Ground snow load, live load = 40 psf, dead load = 10 psf, L/ = 360. c. Ground snow load, live load = 40 psf, dead load = 10 psf, L/ = 360 at main span, L/ = 180 at cantilever with a 220-pound point load applied to end. d. Includes incising factor. e. Northern species with no incising factor. f. Cantilevered spans not exceeding the nominal depth of the joist are permitted.

TABLE R507.7 MAXIMUM JOIST SPACING FOR DECKING
DECKING MATERIAL TYPE AND NOMINAL SIZE MAXIMUM ON-CENTER JOIST SPACING MAXIMUM ON-CENTER JOIST SPACING
DECKING MATERIAL TYPE AND NOMINAL SIZE Decking perpendicular to joist Decking diagonal to joista
11/4-inch-thick wood 16 inches 12 inches
2-inch-thick wood 24 inches 16 inches
Plastic composite In accordance with Section R507.2 In accordance with Section R507.2

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 degree = 0.01745 rad. a. Maximum angle of 45 degrees from perpendicular for wood deck boards.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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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.

R507.9 Vertical and lateral supports at band joist.

Vertical and lateral supports for decks shall comply with this section.

R507.9.1 Vertical supports. Vertical loads shall be transferred to band joists with ledgers in accordance with this section.

R507.9.1.1 Ledger details. Deck ledgers shall be a minimum 2-inch by 8-inch (51 mm by 203 mm) nominal, pressure-preservative-treated Southern pine, incised pressure-preservative-treated hem-fir, or approved, naturally durable, No. 2 grade or better lumber. Deck ledgers shall not support concentrated loads from beams or girders. Deck ledgers shall not be supported on stone or masonry veneer.

R507.9.1.2 Band joist details. Band joists supporting a ledger shall be a minimum 2-inch-nominal (51 mm), solid-sawn, spruce-pine-fir or better lumber or a minimum 1-inch by 9 1 /2-inch (25 mm 241 mm) dimen

sional, Douglas fir or better, laminated veneer lumber. Band joists shall bear fully on the primary structure capable of supporting all required loads.

R507.9.1.3 Ledger to band joist details. Fasteners used in deck ledger connections in accordance with Table R507.9.1.3(1) shall be hot-dipped galvanized or stainless steel and shall be installed in accordance with Table R507.9.1.3(2) and Figures R507.9.1.3(1) and R507.9.1.3(2).

R507.9.1.4 Alternate ledger details. Alternate framing configurations supporting a ledger constructed to meet the load requirements of Section R301.5 shall be permitted.

R507.9.2 Lateral connection. Lateral loads shall be transfered to the ground or to a structure capable of transmitting them to the ground. Where the lateral load connection is provided in accordance with Figure R507.9.2(1), holddown tension devices shall be installed in not less than two locations per deck, within 24 inches (610 mm) of each end of the deck. Each device shall have an allowable stress design capacity of not less than 1,500 pounds (6672 N). Where the lateral load connections are provided in accordance with Figure R507.9.2(2), the hold-down tension devices shall be installed in not less than four locations per deck, and each device shall have an allowable stress design capacity of not less than 750 pounds (3336 N).

TABLE R507.9.1.3(1) DECK LEDGER CONNECTION TO BAND JOIST a, b (Deck live load = 40 psf, deck dead load = 10 psf, snow load 40 psf)

CONNECTION DETAILS JOIST SPAN
CONNECTION DETAILS 6** and less** 6**1 to 8** 8**1 to 10** 10**1 to 12** 12**1 to 14** 14**1 to 16** 16**1 to 18**
CONNECTION DETAILS On-center spacing of fasteners On-center spacing of fasteners On-center spacing of fasteners On-center spacing of fasteners On-center spacing of fasteners On-center spacing of fasteners On-center spacing of fasteners
1/2-inch diameter lag screw with1/2-inch
maximum sheathingc, d		 30 23 18 15 13 11 10
1/2-inch diameter bolt with1/2-inch maximum
sheathingd		 36 36 34 29 24 21 19
1/2-inch diameter bolt with 1-inch maximum
sheathinge		 36 36 29 24 21 18 16

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist. b. Snow load shall not be assumed to act concurrently with live load. c. The tip of the lag screw shall fully extend beyond the inside face of the band joist. d. Sheathing shall be wood structural panel or solid sawn lumber. e. Sheathing shall be permitted to be wood structural panel, gypsum board, fiberboard, lumber or foam sheathing. Up to 1 /2-inch thickness of stacked washers

shall be permitted to substitute for up to 1 /2 inch of allowable sheathing thickness where combined with wood structural panel or lumber sheathing.

224 2019 CALIFORNIA RESIDENTIAL CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

FLOORS

TABLE R507.9.1.3(2) PLACEMENT OF LAG SCREWS AND BOLTS IN DECK LEDGERS AND BAND JOISTS
MINIMUM END AND EDGE DISTANCES AND SPACING BETWEEN ROWS
TOP EDGE BOTTOM EDGE ENDS ROW SPACING
Ledgera 2 inchesd 3/4 inch 2 inchesb 15/8 inchesb
Band Joistc 3/4 inch 2 inches 2 inchesb 15/8 inchesb

For SI: 1 inch = 25.4 mm. a. Lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger in accordance with Figure R507.9.1.3(1). b. Maximum 5 inches. c. For engineered rim joists, the manufacturer’s recommendations shall govern. d. The minimum distance from bottom row of lag screws or bolts to the top edge of the ledger shall be in accordance with Figure R507.9.1.3(1).

mm. a. Lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger in accordance with Figure R507.9.1.3(1). b. Maximum 5 inches. c. For engineered rim joists, the manufacturer’s recommendations shall govern. d. The minimum distance from bottom row of lag screws or bolts to the top edge of the ledger shall be in accordance with Figure R507.9.1.3(1).

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

FLOORS

226 2019 CALIFORNIA RESIDENTIAL CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

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▸Contents — California Residential Code (Title 24, Part 2.5)
California Residential Code (Title 24, Part 2.5)
  1. Chapter 2 — DEFINITIONS AND ABBREVIATIONS
  2. Chapter 1 — SCOPE AND APPLICATION
  3. Chapter 3 — BUILDING PLANNING
  4. Chapter 4 — FOUNDATIONS
  5. ▸Chapter 5 — FLOORS
    Overview
    1. Section R501
    2. Section R502
    3. Section R503
    4. Section R504
    5. Section R505
    6. Section R506
    7. Section R507
  6. Chapter 6 — WALL CONSTRUCTION
  7. Chapter 7 — WALL COVERING
  8. Chapter 8 — ROOF-CEILING CONSTRUCTION
  9. Chapter 9 — ROOF ASSEMBLIES
  10. Chapter 10 — CHIMNEYS AND FIREPLACES
  11. Chapter 44 — REFERENCED STANDARDS
  12. Appendix F — RADON CONTROL METHODS
  13. Appendix H — PATIO COVERS
  14. Appendix I — PRIVATE SEWAGE DISPOSAL
  15. Appendix J — EXISTING BUILDINGS AND STRUCTURES
  16. Appendix K — SOUND TRANSMISSION
  17. Appendix L — PERMIT FEES
  18. Appendix O — AUTOMATIC VEHICULAR GATES
  19. Appendix Q — TINY HOUSES
  20. Appendix R — LIGHT STRAW-CLAY CONSTRUCTION
  21. Appendix S — STRAWBALE CONSTRUCTION
  22. Appendix T — SOLAR-READY PROVISIONS—DETACHED ONE- AND
  23. Appendix V — SWIMMING POOL SAFETY ACT
  24. Appendix W — AREAS PROTECTED BY THE FACILITIES
  25. Appendix X — EMERGENCY HOUSING

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