(Amended by Ord. No. 187,719, Eff. 1/23/23.)
Chapter 6 of the CRC is hereby adopted by reference with the exceptions, modifications and additions set forth below.
(Amended by Ord. No. 184,692, Eff. 12/30/16.)
ITEM | DESCRIPTION OF BUILDING ELEMENTS | NUMBER AND TYPE OF FASTENERa, b, c | SPACING AND LOCATION |
ITEM | DESCRIPTION OF BUILDING ELEMENTS | NUMBER AND TYPE OF FASTENERa, b, c | SPACING AND LOCATION |
Roof | |||
1 | Blocking between ceiling joists or rafters to top plate | 4-8d box (2 1/2" × 0.113") or 3-8d common (2 1/2" × 0131"); or 3-10d box (3" × 0.128"); or 3-3" × 0.131" nails | Toe nail |
2 | Ceiling joists to plate, toe nail | 4-8d box (2 1/2" × 0.113") or 3-8d common (2 1/2" × 0131"); or 3-10d box (3" × 0.128"); or 3-3" × 0.131" nails | Per joist, toe nail |
3 | Ceiling joist not attached to parallel rafter, laps over partitions [see Sections R802.3.1, R802.3.2 and Table R802.5.1(9)] | 4-10d box (3" × 0.128"); or 3-16d common (3 1/2" × 0.162"); or 4-3" × 0.131" nails | Face nail |
4 | Ceiling joist attached to parallel rafter (heel joint) [see Sections R802.3.1 and R802.3.2 and Table R802.5.1(9)] | Table R802.5.1(9) | Face nail |
5 | Collar tie to rafter, face nail or 1 1/4" × 20 ga. ridge strap to rafter | 4-10d box (3" × 0.128"); or 3-10d common (3" × 0.148"); or 4-3" × 0.131" nails | Face nail each rafter |
6 | Rafter or roof truss to plate | 3-16d box nails (3 1/2" × 0.135"); or 3-10d common nails (3" × 0.148"); or 4-10d box (3" × 0.128"); or 4-3" × 0.131" nails | 2 toe nails on one side and 1 toe nail on opposite side of each rafter or truss i |
7 | Roof rafters to ridge, valley or hip rafters or roof rafter to minimum 2" ridge beam | 4-16d (3 1/2" × 0.135"); or 3-10d common (3 1/2" × 0.148"); or 4-10d box (3" × 0.128"); or 4-3" × 0.131" nails | Toe nail |
3-16d box (3 1/2" × 0.135"); or 2-16d common (3 1/2" × 0.162"); or 3-10d box (3" × 0.128"); or 3-3" × 0.131" nails | End nail | ||
Wall | |||
8 | Stud to stud (not at braced wall panels) | 16d common (3 1/2" × 0.162") | 24" o.c. face nail |
10d box (3" × 0.128"); or 3" × 0.131" nails | 16" o.c. face nail | ||
9 | Stud to stud and abutting studs at intersecting wall corners (at braced wall panels) | 16d box (3 1/2" × 0.135"); or 3" × 0.131" nails | 12" o.c. face nail |
16d common (3 1/2" × 0.162") | 16" o.c. face nail | ||
10 | Built-up header (2" to 2" header with 1/2" spacer) | 16d common (3 1/2" × 0.162") | 16" o.c. each edge face nail |
16d box (3 1/2" × 0.135") | 12" o.c. each edge face nail | ||
11 | Continuous header to stud | 5-8d box (2 1/2" × 0.113"); or 4-8d common (2 1/2" × 0.131"); or 4-10d box (3" × 0.128") | Toe nail |
12 | Top plate to top plate | 16d common (3 1/2" × 0.162") | 16" o.c. face nail |
10d box (3" × 0.128"); or 3" × 0.131" nails | 12" o.c. face nail | ||
13 | Double top plate splice for SDCs A-D2 with seismic braced wall line spacing < 25' | 8-16d common (3 1/2" × 0.162"); or 12-16d box (3 1/2" × 0.135"); or 12-10d box (3" × 0.128"); or 12-3" × 0.131" nails | Face nail on each side of end joint (minimum 24" lap splice length each side of end joint) |
Double top plate splice SDCs D0, D1, or D2; and braced wall line spacing ≥ 25' | 12-16d (3 1/2" × 0.135") | ||
14 | Bottom plate to joist, rim joist, band joist or blocking (not at braced wall panels) | 16d common (3 1/2" × 0.162") | 16" o.c. face nail |
16d box (3 1/2" × 0.135"); or 3" × 0.131" nails | 12" o.c. face nail | ||
15 | Bottom plate to joist, rim joist, band joist or blocking (at braced wall panel) | 3-16d box (3 1/2" × 0.135"); or 2-16d common (3 1/2" x 0.162"); or 4-3" × 0.131" nails | 3 each 16" o.c. face nail 2 each 16" o.c. face nail 4 each 16" o.c. face nail |
16 | Top or bottom plate to stud | 4-8d box (2 1/2" × 0.113"); or 3-16d box (3 1/2" × 0.135"); or 4-8d common (2 1/2" × 0.131"); or 4-10d box (3" × 0.128"); or 4-3" × 0.131" nails | Toe nail |
3-16d box (3 1/2" × 0.135"); or 2-16d common (3 1/2" × 0.162"); or 3-10d box (3" × 0.128"); or 3-3" × 0.131" nails | End nail | ||
17 | Top plates, laps at corners and intersections | 3-10d box (3" × 0.128"); or 2-16d common (3 1/2" × 0.162"); or 3-3" × 0.131" nails | Face nail |
18 | 1" brace to each stud and plate | 3-8d box (2 1/2" × 0.113"); or 2-8d common (2 1/2" × 0.131"); or 2-10d box (3" × 0.128"); or 2 staples 1 3/4" | Face nail |
19 | 1" × 6" sheathing to each bearing | 3-8d box (2 1/2" × 0.113"); or 2-8d common (2 1/2" × 0.131"); or 2-10d box (3" × 0.128"); or 2 staples, 1" crown, 16 ga., 1 3/4" long | Face nail |
20 | 1" × 8" and wider sheathing to each bearing | 3-8d box (2 1/2" × 0.113"); or 3-8d common (2 1/2" × 0.131"); or 3-10d box (3" × 0.128"); or 3 staples, 1" crown, 16 ga., 1 3/4" long | Face nail |
Wider than 1" × 8" 4-8d box (2 1/2" × 0.113"); or 3-8d common (2 1/2" × 0.131"); or 3-10d box (3" × 0.128"); or 4 staples, 1" crown, 16 ga., 1 3/4" long | |||
Floor | |||
21 | Joist to sill, top plate or girder | 4-8d box (2 1/2" × 0.113"); or 3-8d common (2 1/2" × 0.131"); or 3-10d box (3" × 0.128"); or 3-3" × 0.131" nails | Toe nail |
22 | Rim joist, band joist or blocking to sill or top plate (roof applications also) | 8d box (2 1/2" × 0.113") | 4" o.c. toe nail |
8d common (2 1/2" × 0.131"); or 10d box (3" × 0.128"); or 3" × 0.131" nails | 6" o.c. toe nail | ||
23 | 1" × 6" subfloor or less to each joist | 3-8d box (2 1/2" × 0.113"); or 2-8d common (2 1/2" × 0.131"); or 3-10d box (3" × 0.128"); or 2 staples, 1" crown, 16 ga., 1 3/4" long | Face nail |
24 | 2" subfloor to joist or girder | 3-16d box (31/2" × 0.135"); or 2-16d common (3 1/2" × 0.162") | Blind and face nail |
25 | 2" planks (plank & beam - floor & roof) | 3-16d box (3 1/2" × 0.135"); or 2-16d common (3 1/2" x 0.162") | At each bearing, face nail |
26 | Band or rim joist to joist | 3-16d common (3 1/2" × 0.162") 4-10 box (3" × 0.128"), or 4-3" × 0.131" nails; or 4-3" × 14 ga. staples, 7/16" crown | End nail |
27 | Built-up girders and beams, 2-inch lumber layers | 20d common (4" × 0.192"); or | Nail each layer as follows: 32" o.c. at top and bottom and staggered. |
10d box (3" × 0.128"); or 3" × 0.131" nails | 24" o.c. face nail at top and bottom staggered on opposite sides | ||
And: 2-20d common (4" × 0.192"); or 3-10d box (3" × 0.128"); or 3-3" × 0.131" nails | Face nail at ends and at each splice | ||
28 | Ledger strip supporting joists or rafters | 4-16d box (3 1/2" × 0.135"); or 3-16d common (3 1/2" × 0.162"); or 4-10d box (3" × 0.128"); or 4-3" × 0.131" nails | At each joist or rafter, face nail |
29 | Bridging to joist | 2-10d (3" × 0.128") | Each end, toe nail |
ITEM | DESCRIPTION OF BUILDING ELEMENTS | NUMBER AND TYPE OF FASTENERa, b, c | SPACING OF FASTENSERS | |
ITEM | DESCRIPTION OF BUILDING ELEMENTS | NUMBER AND TYPE OF FASTENERa, b, c | SPACING OF FASTENSERS | |
Edges (inches) h | Intermediate supports c, e (inches) | |||
Wood structural panels, subfloor, roof and interior wall sheathing to framing and particleboard wall sheathing to framing [see Table R602.3(3) for wood structural panel exterior wall sheathing to wall framing] | ||||
30 | 3/8" - 1/2" | 6d common (2" x 0.113") nail (subfloor, wall) i 8d common (2 ½" × 0.131") nail (roof) | 6 | 12 f |
31 | 19/32" - 1" | 8d common nail (2 1/2" × 0.131") | 6 | 12 f |
32 | 1 1/8" - 1 1/4" | 10d common (3" × 0.148") nail; or 8d (2 1/2" × 0.131") deformed nail | 6 | 12 |
Other wall sheathing | ||||
33 | 1/2" structural cellulosic fiberboard sheathing | 11/2" galvanized roofing nail, 7/16 " head diameter, or 1" crown staple 16 a., 11/4"long | 3 | 6 |
34 | 25/32" structural cellulosic fiberboard sheathing | 1 3/4" galvanized roofing nail, 7/16" head diameter, or 1" crown staple 16 ga., 11/4" long | 3 | 6 |
35 | 1/2" gypsum sheathing d, j | 1 1/2" galvanized roofing nail; staple galvanized, 1 1/2" long; 1 1/4" screws, Type W or S | 7 | 7 |
36 | 5/8" gypsum sheathing d, j | 1 3/4" galvanized roofing nail; staple galvanized, 1 5/8" long; 1 5/8" screws, Type W or S | 7 | 7 |
Wood structural panels, combination subfloor underlayment to framing | ||||
37 | 3/4" and less | 6d deformed (2" × 0.120") nail; or 8d common (2 1/2" × 0.131") nail | 6 | 12 |
38 | 7/8" - 1" | 8d common (2 1/2" × 0.131") nail; or 8d deformed (2 1/2" × 0.120") nail | 6 | 12 |
39 | 1 1/8" - 1 1/4 " | 10d common (3" × 0.148" ) nail; or 8d deformed (2 1/2" × 0.120") nail | 6 | 12 |
a. Nails are smooth-common, box or deformed shanks except where otherwise stated. Nails used for framing and sheathing connections shall have minimum average bending yield strengths as shown: 80 ksi for shank diameter of 0.192 inch (4.87 mm) (20d common nail), 90 ksi for shank diameters larger than 0.142 inch (3.60 mm) but not larger than 0.177 inch (4.49 mm), and 100 ksi for shank diameters of 0.142 inch (3.60 mm) or less.
b. Staples are 16 gage wire and have a minimum 7/16 inch (11.11 mm) on diameter crown width.
c. Nails shall be spaced at not more than 6 inches (152.4 mm) on center at all supports where spans are 48 inches (1219.2 mm) or greater.
d. 4 foot by 8 foot (1219.2 mm x 2438.1 mm) or 4 foot by 9 foot (1219.2 mm x 2743.2 mm) panels shall be applied vertically.
e. Spacing of fasteners not included in this table shall be based on LAMC Table 91.5.602.3(2).
f. Where the ultimate design wind speed is greater than 130 mph, nails for attaching panel roof sheathing to intermediate supports shall be spaced 6 inches on center for minimum 48 inch distance from ridges, eaves and gable end walls; and 4 inches on center to gable end wall framing.
g. Gypsum sheathing shall conform to ASTM C 1396 and shall be installed in accordance with GA 253. Fiberboard sheathing shall conform to ASTM C 208.
h. Spacing of fasteners on floor sheathing panel edges applies to panel edges supported by framing members and required blocking and at floor perimeters only. Spacing of fasteners on roof sheathing panel edges applies to panel edges supported by framing members and required blocking. Blocking of roof or floor sheathing panel edges perpendicular to the framing members need not be provided except as required by other provisions of this Code. Floor perimeter shall be supported by framing members or solid blocking.
i. Where a rafter is fastened to an adjacent parallel ceiling joist in accordance with this schedule, provide two toe nails on one side of the rafter and toe nails from the ceiling joist to top plate in accordance with this schedule. The toe nail on the opposite side of the rafter shall not be required.
j. Use of staples in braced wall panels shall be prohibited in Seismic Design Category D0, D1, or D2.
Table 91.5.602.3(2)
Alternate Attachments to Table 91.5.602.3(1)
Alternate Attachments to Table 91.5.602.3(1)
(Amended by Ord. No. 184,692, Eff. 12/30/16.)
NOMINAL MATERIAL THICKNESS (inches) | DESCRIPTION a, b OF FASTENER AND LENGTH (inches) | SPACING c OF FASTENERS | |
Edges (inches) | Intermediate supports (inches) | ||
Wood structural panels subfloor, roof g and wall sheathing to framing and particleboard wall sheathing to framing f | |||
Up to 1/2 | Staple 15 ga. 1 3/4 | 4 | 8 |
0.097 - 0.099 Nail 2 1/4 | 3 | 6 | |
Staple 16 ga. 1 3/4 | 3 | 6 | |
19/32 and 5/8 | 0.113 Nail 2 | 3 | 6 |
Staple 15 and 16 ga. 2 | 4 | 8 | |
0.097 - 0.099 Nail 2 1/4 | 4 | 8 | |
23/32 and 3/4 | Staple 14 ga. 2 | 4 | 6 |
Staple 15 ga. 1 3/4 | 3 | 8 | |
0.097 - 0.099 Nail 2 1/4 | 4 | 8 | |
Staple 16 ga. 2 | 4 | 8 | |
1 | Staple 14 ga. 2 1/4 | 4 | 8 |
0.113 Nail 2 1/4 | 3 | 6 | |
Staple 15 ga. 2 1/4 | 4 | 8 | |
0.097 - 0.099 Nail 2 1/2 | 4 | 8 | |
NOMINAL MATERIAL THICKNESS (inches) | DESCRIPTION a,b OF FASTENER AND LENGTH (inches) | SPACING c OF FASTENERS | |
Edges (inches) | Body of Panel d (inches) | ||
Floor underlayment; plywood - hardboard - particleboard f - fiber - cement h | |||
Fiber-cement | |||
1/4 | 3d, corrosion-resistant, ring shank nails (finished flooring other than tile) | 3 | 6 |
Staple 18 ga., 7/8 long, 1/4 crown (finished flooring other than tile) | 3 | 6 | |
1 1/4 long × .121 shank × .375 head diameter corrosion-resistant (galvanized or stainless steel) roofing nails (for tile finish) | 8 | 8 | |
1 1/4 long, No. 8 × .375 head diameter, ribbed wafer-head screws (for tile finish) | 8 | 8 | |
Plywood | |||
1/4 and 5/16 | 1 1/4 ring or screw shank nail - minimum 12 1/2 ga. (0.099") shank diameter | 3 | 6 |
Staple 18 ga., 7/8, 3/16 crown width | 2 | 5 | |
11/32, 3/8, 15/32, and 1/2 | 1 1/4 ring or screw shank nail - minimum 12 1/2 ga. (0.099") shank diameter | 6 | 8 e |
19/32, 5/8, 23/32, and 3/4 | 1 1/2 ring or screw shank nail - minimum 12 1/2 ga. (0.099") shank diameter | 6 | 8 |
Staple 16 ga. 1 1/2 | 6 | 8 | |
Hardboard f | |||
0.200 | 1 1/2 long ring-grooved underlayment nail | 6 | 6 |
4d cement-coated sinker nail | 6 | 6 | |
Staple 18 ga., 7/8 long (plastic coated) | 3 | 6 | |
Particleboard | |||
1/4 | 4d ring-grooved underlayment nail | 3 | 6 |
Staple 18 ga., 7/8 long, 3/16 crown | 3 | 6 | |
3/8 | 6d ring-grooved underlayment nail | 6 | 10 |
Staple 16 ga., 1 1/8 long, 3/8 crown | 3 | 6 | |
1/2, 5/8 | 6d ring-grooved underlayment nail | 6 | 10 |
Staple 16 ga., 1 5/8 long, 3/8 crown | 3 | 6 | |
For SI: 1 inch = 25.4 mm.
a. Nail is a general description and shall be permitted to be T-head, modified round head or round head.
b. Staples shall have a minimum crown width of 7/16-inch on diameter except as noted. Use of staples in roof, floor, subfloor, and braced wall panels shall be prohibited in Seismic Design Category D0, D1 or D2.
c. Nails or staples shall be spaced at not more than 6 inches on center at all supports where spans are 48 inches or greater. Nails or staples shall be spaced at not more than 12 inches on center at intermediate supports for floors.
d. Fasteners shall be placed in a grid pattern throughout the body of the panel.
e. For 5-ply panels, intermediate nails shall be spaced not more than 12 inches on center each way.
f. Hardboard underlayment shall conform to CPA/ANSI A135.4
g. Specified alternate attachments for roof sheathing shall be permitted where the ultimate design wind speed is less than 130 mph. Fasteners attaching wood structural panel roof sheathing to gable end wall framing shall be installed using the spacing listed for panel edges.
h. Fiber-cement underlayment shall conform to ASTM C1288 or ISO 8336, Category C.
91.5.602.3.2. (Amended by Ord. No. 184,692, Eff. 12/30/16.) Wood stud walls shall be capped with a double top plate installed to provide overlapping at corners and intersections with bearing partitions. End joints in top plates shall be offset at least 24 inches (609.6 mm). Joints in plates need not occur over studs. Plates shall be not less than 2 inches (50.8 mm) nominal thickness and have a width at least equal to the width of the studs.
EXCEPTION: In other than Seismic Design Category Do, D1, or D2, a single top plate used as an alternative to a double top plate shall comply with the following:
1. The single top plate shall be tied at the corners, intersecting walls, and at in-line splices in straight wall lines in accordance with LAMC Table 91.5.602.3.2.
2. The rafters or joists are centered over the studs with a tolerance of no more than 1 inch (25 mm).
3. Omission of the top plate is permitted over headers where the headers are adequately tied to adjacent wall sections in accordance with LAMC Table 91.5.602.3.2.
(Added by Ord. No. 184,692, Eff. 12/30/16.)
CONDITION | TOP-PLATE SPLICE LOCATION | |||
Corners and intersecting walls | Butt joints in straight walls | |||
Splice plate size | Minimum nails each side of joint | Splice plate size | Minimum nails each side of joint | |
Structures in SDC A-C | 3" x 6" x 0.036" galvanized steel plate or equivalent | (6) 8d box (2 1/2" × 0.113") nails | 3' × 12" × 0.036" galvanized steel plate or equivalent | (12) 8d box (2 1/2" × 0.113") nails |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
91.5.602.10.2.3. Minimum Number of Braced Wall Panels. (Added by Ord. No. 182,845, Eff. 1/3/14.) Braced wall lines with a length of 16 feet (4877 mm) or less shall have a minimum of two braced wall panels of any length or one braced wall panel equal to 48 inches (1219 mm) or more. Braced wall lines greater than 16 feet (4877 mm) shall have a minimum of two braced wall panels. No braced wall panel shall be less than 48 inches in length in Seismic Design Category D
0
, D
1
, or D
2
.
(Added by Ord. No. 182,845, Eff. 1/3/14.)
• SOIL CLASS Db • WALL HEIGHT = 10 FEET • 10 PSF FLOOR DEAD LOAD • 15 PSF ROOF/CEILING DEAD LOAD • BRACED WALL LINE SPACING 25 FEET | MINIMUM TOTAL LENGTH (FEET) OF BRACED WALL PANELS REQUIRED ALONG EACH BRACED WALL LINEa | ||||||
Seismic Design Category | Story Location | Braced Wall Line Length (feet) | Method LIBc | Method GBe | Methods DWB, SFB, PBS, PCPe, HPS, CS-SFBd | Method WSP | Methods CS-WSP, CS-G |
• SOIL CLASS Db • WALL HEIGHT = 10 FEET • 10 PSF FLOOR DEAD LOAD • 15 PSF ROOF/CEILING DEAD LOAD • BRACED WALL LINE SPACING 25 FEET | MINIMUM TOTAL LENGTH (FEET) OF BRACED WALL PANELS REQUIRED ALONG EACH BRACED WALL LINEa | ||||||
Seismic Design Category | Story Location | Braced Wall Line Length (feet) | Method LIBc | Method GBe | Methods DWB, SFB, PBS, PCPe, HPS, CS-SFBd | Method WSP | Methods CS-WSP, CS-G |
C (townhouses only) |  | 10 | 2.5 | 2.5 | 2.5 | 1.6 | 1.4 |
20 | 5.0 | 5.0 | 5.0 | 3.2 | 2.7 | ||
30 | 7.5 | 7.5 | 7.5 | 4.8 | 4.1 | ||
40 | 10.0 | 10.0 | 10.0 | 6.4 | 5.4 | ||
50 | 12.5 | 12.5 | 12.5 | 8.0 | 6.8 | ||
 | 10 | NP | 4.5 | 4.5 | 3.0 | 2.6 | |
20 | NP | 9.0 | 9.0 | 6.0 | 5.1 | ||
30 | NP | 13.5 | 13.5 | 9.0 | 7.7 | ||
40 | NP | 18.0 | 18.0 | 12.0 | 10.2 | ||
50 | NP | 22.5 | 22.5 | 15.0 | 12.8 | ||
 | 10 | NP | 6.0 | 6.0 | 4.5 | 3.8 | |
20 | NP | 12.0 | 12.0 | 9.0 | 7.7 | ||
30 | NP | 18.0 | 18.0 | 13.5 | 11.5 | ||
40 | NP | 24.0 | 24.0 | 18.0 | 15.3 | ||
50 | NP | 30.0 | 30.0 | 22.5 | 19.1 | ||
D0 | | 10 | NP | 5.6 | 5.6 | 1.8 | 1.6 |
20 | NP | 11.0 | 11.0 | 3.6 | 3.1 | ||
30 | NP | 16.6 | 16.6 | 5.4 | 4.6 | ||
40 | NP | 22.0 | 22.0 | 7.2 | 6.1 | ||
50 | NP | 27.6 | 27.6 | 9.0 | 7.7 | ||
| 10 | NP | NP | NP | 3.8 | 3.2 | |
20 | NP | NP | NP | 7.5 | 6.4 | ||
30 | NP | NP | NP | 11.3 | 9.6 | ||
40 | NP | NP | NP | 15.0 | 12.8 | ||
50 | NP | NP | NP | 18.8 | 16.0 | ||
| 10 | NP | NP | NP | 5.3 | 4.5 | |
20 | NP | NP | NP | 10.5 | 9.0 | ||
30 | NP | NP | NP | 15.8 | 13.4 | ||
40 | NP | NP | NP | 21.0 | 17.9 | ||
50 | NP | NP | NP | 26.3 | 22.3 | ||
D1 | | 10 | NP | 6.0 | 6.0 | 2.0 | 1.7 |
20 | NP | 12.0 | 12.0 | 4.0 | 3.4 | ||
30 | NP | 18.0 | 18.0 | 6.0 | 5.1 | ||
40 | NP | 24.0 | 24.0 | 8.0 | 6.8 | ||
50 | NP | 30.0 | 30.0 | 10.0 | 8.5 | ||
| 10 | NP | NP | NP | 4.5 | 3.8 | |
20 | NP | NP | NP | 9.0 | 7.7 | ||
30 | NP | NP | NP | 13.5 | 11.5 | ||
40 | NP | NP | NP | 18.0 | 15.3 | ||
50 | NP | NP | NP | 22.5 | 19.1 | ||
| 10 | NP | NP | NP | 6.0 | 5.1 | |
20 | NP | NP | NP | 12.0 | 10.2 | ||
30 | NP | NP | NP | 18.0 | 15.3 | ||
40 | NP | NP | NP | 24.0 | 20.4 | ||
50 | NP | NP | NP | 30.0 | 25.5 | ||
D2 | | 10 | NP | 8.0 | 8.0 | 2.5 | 2.1 |
20 | NP | 16.0 | 16.0 | 5.0 | 4.3 | ||
30 | NP | 24.0 | 24.0 | 7.5 | 6.4 | ||
40 | NP | 32.0 | 32.0 | 10.0 | 8.5 | ||
50 | NP | 40.0 | 40.0 | 12.5 | 10.6 | ||
| 10 | NP | NP | NP | 5.5 | 4.7 | |
20 | NP | NP | NP | 11.0 | 9.4 | ||
30 | NP | NP | NP | 16.5 | 14.0 | ||
40 | NP | NP | NP | 22.0 | 18.7 | ||
50 | NP | NP | NP | 27.5 | 23.4 | ||
| 10 | NP | NP | NP | NP | NP | |
20 | NP | NP | NP | NP | NP | ||
30 | NP | NP | NP | NP | NP | ||
40 | NP | NP | NP | NP | NP | ||
50 | NP | NP | NP | NP | NP | ||
Cripple wall below one- or two-story dwelling | 10 | NP | NP | NP | 7.5 | 6.4 | |
20 | NP | NP | NP | 15.0 | 12.8 | ||
30 | NP | NP | NP | 22.5 | 19.1 | ||
40 | NP | NP | NP | 30.0 | 25.5 | ||
50 | NP | NP | NP | 37.5 | 31.9 | ||
For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound per square foot = 0.0479 kPa.
a. Linear interpolation shall be permitted.
b. Wall bracing lengths are based on a soil site class "D". Interpolation of bracing length between the Sds values associated with the Seismic Design Categories shall be permitted when a site-specific Sds value is determined in accordance with CBC Section 1613.3. (Amended by Ord. No. 186,488, Eff. 12/27/19.)
c. Method LIB (methods defined by LAMC Table 91.5.602.10.4) shall have gypsum board fastened to at least one side with nails or screws per CRC Table R602.3(1) for exterior sheathing or CRC Table R702.3.5 for interior gypsum board. Spacing of fasteners at panel edges shall not exceed 8 inches (203.2 mm). (Amended by Ord. No. 185,587, Eff. 7/16/18.)
d. Method CS-SFB applies in SDC C only.
e. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC D0, D1, and D2. Methods DWB, SFB, PBS, and HPS are not permitted in SDC D0, D1, and D2.
(Added by Ord. No. 182,845, Eff. 1/3/14.)
METHODS, MATERIAL | MINIMUM THICKNESS | FIGURE | CONNECTION CRITERIAa | ||
Fasteners | Spacing | ||||
METHODS, MATERIAL | MINIMUM THICKNESS | FIGURE | CONNECTION CRITERIAa | ||
Fasteners | Spacing | ||||
Intermittent Bracing Methods | LIB Let-in-bracing | 1 × 4 wood or approved metal straps at 45° to 60° angles for maximum 16" stud spacing |  | Wood: 2-8d common nails or 3-8d (2 1/2" long × 0.113" dia.) nails | Wood: per stud and top and bottom plates |
Metal strap: per manufacturer | Metal: per manufacturer | ||||
DWB Diagonal wood boards | 3/4"(1" nominal) for maximum 24" stud spacing |  | 2-8d (2 1/2" long × 0.113" dia.) nails or 2 - 1 3/4" long staples | Per stud | |
WSP Wood structural panel (See Section R604) | 15/32" |  | Exterior sheathing using 8d common nails (2.5” × 0.131”) per Table R602.3(3) | 6" edges 12" field | |
Interior sheathing per Table 91.5.602.3(1) or 91.5.602.3(2) | Varies by fastener | ||||
BV-WSP e Wood structural Panels with stone or masonry veneer (See Section R602.10.6.5) | 15/32" | See Figure R602.10.6.5 | 8d common (2 1/2" × 0.131) nails | 4" at panel edges12"at intermediate supports 4"at braced wall panel end posts | |
SFB Structural fiberboard sheathing | 1/2" or 25/32" for maximum 16" stud spacing |  | 1 1/2" long × 0.12" dia. (for 1/2" thick sheathing) 1 3/4" long × 0.12" dia. (for 25/32" thick sheathing) galvanized roofing nails or 8d common (2 1/2" long × 0.131" dia.) nails | 3" edges 6" field | |
GB Gypsum board | 1/2" |  | Nails or screws per Table 91.5.602.3(1) for exterior locations | For all braced wall panel locations: 7" edges (including top and bottom plates) 7" field | |
Nails or screws per Table R702.3.5 for interior locations | |||||
PBS Particleboard sheathing (See Section R605) | 3/8" or 1/2" for maximum 16" stud spacing |  | For 3/8", 6d common (2" long × 0.113" dia.) nails For 1/2", 8d common (2 1/2" long × 0.131" dia.) nails | 3" edges 6" field | |
PCP Portland cement plaster | See Section R703.6 for maximum 16" stud spacing |  | 1 1/2" long, 11 gage, 7/16" dia. head nails | 6" o.c. on all framing members | |
HPS Hardboard panel siding | 7/16" for maximum 16" stud spacing |  | 0.092" dia., 0.225" dia. head nails with length to accommodate 11/2"penetration into studs | 4" edges 8" field | |
ABW Alternate braced wall | 15/32" |  | See Section R602.10.6.1 | See Section R602.10.6.1 | |
PFH Portal frame with hold-downs | 15/32" |  | See Section R602.10.6.2 | See Section R602.10.6.2 | |
PFG Portal frame at garage | 15/32" |  | See Section R602.10.6.3 | See Section R602.10.6.3 | |
Continuous Sheathing Methods | CS-WSP Continuously sheathed wood structural panel | 15/32" |  | Exterior sheathing per Table R602.3(3) | 6" edges 12" field |
Interior sheathing per Table 91.5.602.3(1) or 91.5.602.3(2) | Varies by fastener | ||||
CS-Gb, c Continuously sheathed wood structural panel adjacent to garage openings | 15/32" |  | See Method CS-WSP | See Method CS-WSP | |
CS-PF Continuously sheathed portal frame | 15/32" |  | See Section R602.10.6.4 | See Section R602.10.6.4 | |
CS-SFBd Continuously sheathed structural fiberboard | 1/2" or 25/32" for maximum 16" stud spacing |  | 1 1/2" long × 0.12" dia. (for 1/2" thick sheathing) 1 3/4" long × 0.12" dia. (for 25/32" thick sheathing) galvanized roofing nails or 8d common (2 1/2" long × 0.131" dia.) nails | 3" edges 6" field | |
For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 degree = 0.0175 rad, 1 pound per square foot = 47.8 N/m2, 1 mile per hour = 0.447 m/s.
a. Adhesive attachment of wall sheathing, including Method GB, shall not be permitted in Seismic Design Categories C, D0, D1 and D2.
b. Applies to panels next to garage door opening when supporting gable end wall or roof load only. May only be used on one wall of the garage. In Seismic Design Categories D0, D1 and D2, roof covering dead load may not exceed 3 psf.
c. Garage openings adjacent to a Method CS-G panel shall be provided with a header in accordance with CRC Table 602.7(1). A full height clear opening shall not be permitted adjacent to a Method CS-G panel. (Amended by Ord. No. 185,587, Eff. 7/16/18.)
d. Method CS-SFB does not apply in Seismic Design Categories D0, D1 and D2 and in areas where the wind speed exceeds 100 mph.
e. Method applies to detached one- and two-family dwellings in Seismic Design Categories D0 through D2 only.
f. Methods GB and PCP braced wall panel h/d ratio shall not exceed 1:1 in SDC D0, D1, and, D2. Methods LIB, DWB, SFB, PBS, HPS, and PFG are not permitted in SDC D0, D1, and, D2.
(Amended by Ord. No. 184,692, Eff. 12/30/16.)
METHOD (See Table R602.10.4) | MINIMUM LENGTHa (inches) | CONTRIBUTING LENGTH (inches) | |||||
Wall Height | |||||||
8 feet | 9 feet | 10 feet | 11 feet | 12 feet | |||
METHOD (See Table R602.10.4) | MINIMUM LENGTHa (inches) | CONTRIBUTING LENGTH (inches) | |||||
Wall Height | |||||||
8 feet | 9 feet | 10 feet | 11 feet | 12 feet | |||
DWB, WSP, SFB, PBS, PCP, HPS, BV-WSP | 48 | 48 | 48 | 53 | 58 | Actualb | |
GB | 48 | 48 | 48 | 53 | 58 | Double sided = Actual Single sided = 0.5 × Actual | |
LIB | 55 | 62 | 69 | NP | NP | Actualb | |
ABW | SDC A, B and C, wind speed < 110 mph | 28 | 32 | 34 | 38 | 42 | 48 |
SDC Do, D1 and D2, wind speed < 110 mph | 32 | 32 | 34 | NP | NP | ||
PFH | Supporting roof only | 24 | 24 | 24 | 24c | 24c | 48 |
Supporting one story and roof | 24 | 24 | 24 | 27c | 29c | 48 | |
PFG | 24 | 27 | 30 | 33d | 36d | 1.5 × Actualb | |
CS-G | 24 | 27 | 30 | 33 | 36 | Actualb | |
CS-PF | 24 | 24 | 24 | 24e | 24e | Actualb | |
CS-WSP, CS-SFB | Adjacent clear opening height (inches) | ||||||
64 | 24 | 27 | 30 | 33 | 36 | Actualb | |
68 | 26 | 27 | 30 | 33 | 36 | ||
72 | 27 | 27 | 30 | 33 | 36 | ||
76 | 30 | 29 | 30 | 33 | 36 | ||
80 | 32 | 30 | 30 | 33 | 36 | ||
84 | 35 | 32 | 32 | 33 | 36 | ||
88 | 38 | 35 | 33 | 33 | 36 | ||
92 | 43 | 37 | 35 | 35 | 36 | ||
96 | 48 | 41 | 38 | 36 | 36 | ||
100 | — | 44 | 40 | 38 | 38 | ||
104 | — | 49 | 43 | 40 | 39 | ||
108 | — | 54 | 46 | 43 | 41 | ||
112 | — | — | 50 | 45 | 43 | ||
116 | — | — | 55 | 48 | 45 | ||
120 | — | — | 60 | 52 | 48 | ||
124 | — | — | — | 56 | 51 | ||
128 | — | — | — | 61 | 54 | ||
132 | — | — | — | 66 | 58 | ||
136 | — | — | — | — | 62 | ||
140 | — | — | — | — | 66 | ||
144 | — | — | — | — | 72 | ||
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
NP = Not Permitted.
a. Linear interpolation shall be permitted.
b. Use the actual length when it is greater than or equal to the minimum length.
c. Maximum header height for PFH is 10 feet (3048 mm) in accordance with CRC Figure R602.10.6.2, but wall height may be increased to 12 feet (3657.6 mm) with pony wall.
d. Maximum opening height for PFG is 10 feet (3048 mm) in accordance with CRC Figure R602.10.6.3, but wall height may be increased to 12 feet (3657.6 mm) with pony wall.
e. Maximum opening height for CS-PF is 10 feet (3048 mm) in accordance with CRC Figure R602.10.6.4, but wall height may be increased to 12 feet (3657.6 mm) with pony wall.
(Amended by Ord. No. 187,719, Eff. 1/23/23.)
(Amended by Ord. No. 184,692, Eff. 12/30/16.)
(Added by Ord. No. 182,845, Eff. 1/3/14.)
91.5.606.12.2.2.3. Reinforcement of Requirements for Masonry Elements. Masonry elements listed in CRC Section R606.12.2.2.2 shall be reinforced in either the horizontal or vertical direction as shown in CRC Figure R606.11(2) and in accordance with the following: (Amended by Ord. No. 184,692, Eff. 12/30/16.)
1. Horizontal reinforcement. Horizontal joint reinforcement shall consist of at least one No. 4 bar spaced not more than 48 inches (1219 mm). Horizontal reinforcement shall be provided within 16 inches (406 mm) of the top and bottom of these masonry elements.
2. Vertical reinforcement. Vertical reinforcement shall consist of at least one No. 4 bar spaced not more than 48 inches (1219 mm). Vertical reinforcement shall be within 16 inches (406 mm) of the ends of masonry walls.