Page 241 - 2018_IRC

WALL CONSTRUCTION

W
WHERE AIR GAP AT
TOP IS NOT USED, CENTER
W/3 AVAILABLE FOR VENT
HOLES
H/3

H
W/3 W/3 W/3

PROVIDE VENTING
PER SECTION R806
ROOF SHEATHING
EDGE NAILING PER
B TABLE R602.3(1) (TYP)
a
2MAX ″ OPEN 2MAX ″ OPEN BRACING A
VENTING
MAX ROOF 2x
TRUSSES
′″ 4-0 2x BLOCKING PER BLK’G
R802.10

BRACING ROOF TRUSSES BRACED WALL
BRACED WALL PER R802.10 PANEL
PANEL
NAILING PER
TABLE R602.3(1)
6-0 MAX′″
A SECTION B ELEVATION

For SI: 1 inch = 25.4 mm, 1 foot =304.8 mm
a. Methods of bracing shall be as described in Section R602.10.4.

FIGURE R602.10.8.2(3)
BRACED WALL PANEL CONNECTION OPTION TO PERPENDICULAR RAFTERS OR ROOF TRUSSES

R602.10.9 Braced wall panel support. Braced wall panel reinforcement sized and located in accordance with
support shall be provided as follows: Figure R602.10.9.
1. Cantilevered floor joists complying with Section R602.10.9.1 Braced wall panel support for Seismic
R502.3.3 shall be permitted to support braced wall Design Categories D , D and D . In Seismic Design
1
2
0
panels. Categories D , D and D , braced wall panel footings
1
2
0
2. Raised floor system post or pier foundations sup- shall be as specified in Section R403.1.2.
porting braced wall panels shall be designed in R602.10.10 Cripple wall bracing. Cripple walls shall be
accordance with accepted engineering practice. constructed in accordance with Section R602.9 and braced
in accordance with this section. Cripple walls shall be
3. Masonry stem walls with a length of 48 inches
(1219 mm) or less supporting braced wall panels braced with the length and method of bracing used for the
shall be reinforced in accordance with Figure wall above in accordance with Tables R602.10.3(1) and
R602.10.9. Masonry stem walls with a length R602.10.3(3), and the applicable adjustment factors in
Table R602.10.3(2) or R602.10.3(4), respectively, except
greater than 48 inches (1219 mm) supporting braced that the length of cripple wall bracing shall be multiplied
wall panels shall be constructed in accordance with
Section R403.1 Methods ABW and PFH shall not by a factor of 1.15. Where gypsum wall board is not used
be permitted to attach to masonry stem walls. on the inside of the cripple wall bracing, the length adjust-
ments for the elimination of the gypsum wallboard, or
4. Concrete stem walls with a length of 48 inches equivalent, shall be applied as directed in Tables
(1219 mm) or less, greater than 12 inches (305 mm) R602.10.3(2) and R602.10.3(4) to the length of cripple
tall and less than 6 inches (152 mm) thick shall have wall bracing required. This adjustment shall be taken in
addition to the 1.15 increase.
216 2018 INTERNATIONAL RESIDENTIAL CODE ®
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