Page 229 - 2018_IRC

WALL CONSTRUCTION

R602.10.4.2 Continuous sheathing methods. Contin- 3. Blocking at horizontal joints shall not be
uous sheathing methods require structural panel sheath- required in wall segments that are not counted
ing to be used on all sheathable surfaces on one side of as braced wall panels.
a braced wall line including areas above and below 4. Where Method GB panels are installed hori-
openings and gable end walls and shall meet the zontally, blocking of horizontal joints is not
requirements of Section R602.10.7. required.
R602.10.4.3 Braced wall panel interior finish mate- R602.10.5 Minimum length of a braced wall panel. The
rial. Braced wall panels shall have gypsum wall board minimum length of a braced wall panel shall comply with
installed on the side of the wall opposite the bracing Table R602.10.5. For Methods CS-WSP and CS-SFB, the
1
material. Gypsum wall board shall be not less than / 2 minimum panel length shall be based on the adjacent clear
inch (12.7 mm) in thickness and be fastened with nails opening height in accordance with Table R602.10.5 and
or screws in accordance with Table R602.3(1) for exte- Figure R602.10.5. Where a panel has an opening on either
rior sheathing or Table R702.3.5 for interior gypsum side of differing heights, the taller opening height shall be
wall board. Spacing of fasteners at panel edges for used to determine the panel length.
gypsum wall board opposite Method LIB bracing shall
not exceed 8 inches (203 mm). Interior finish material R602.10.5.1 Contributing length. For purposes of
shall not be glued in Seismic Design Categories D , D 1 computing the required length of bracing in Tables
0
and D . R602.10.3(1) and R602.10.3(3), the contributing length
2
of each braced wall panel shall be as specified in Table
Exceptions: R602.10.5.
1. Interior finish material is not required opposite R602.10.5.2 Partial credit. For Methods DWB, WSP,
wall panels that are braced in accordance with SFB, PBS, PCP and HPS in Seismic Design Categories
Methods GB, BV-WSP, ABW, PFH, PFG and A, B and C, panels between 36 inches and 48 inches
CS-PF, unless otherwise required by Section (914 mm and 1219 mm) in length shall be considered a
R302.6. braced wall panel and shall be permitted to partially
2. An approved interior finish material with an contribute toward the required length of bracing in
in-plane shear resistance equivalent to gypsum Tables R602.10.3(1) and R602.10.3(3), and the contrib-
board shall be permitted to be substituted, uting length shall be determined from Table
unless otherwise required by Section R302.6. R602.10.5.2.
3. Except for Method LIB, gypsum wall board is R602.10.6 Construction of Methods ABW, PFH, PFG,
permitted to be omitted provided that the CS-PF and BV-WSP. Methods ABW, PFH, PFG, CS-PF
required length of bracing in Tables and BV-WSP shall be constructed as specified in Sections
R602.10.3(1) and R602.10.3(3) is multiplied R602.10.6.1 through R602.10.6.5.
by the appropriate adjustment factor in Tables R602.10.6.1 Method ABW: Alternate braced wall
R602.10.3(2) and R602.10.3(4), respectively, panels. Method ABW braced wall panels shall be con-
unless otherwise required by Section R302.6. structed in accordance with Figure R602.10.6.1. The
R602.10.4.4 Panel joints. Vertical joints of panel hold-down force shall be in accordance with Table
sheathing shall occur over and be fastened to common R602.10.6.1.
studs. Horizontal joints of panel sheathing in braced R602.10.6.2 Method PFH: Portal frame with hold-
wall panels shall occur over and be fastened to com- downs. Method PFH braced wall panels shall be con-
1
mon blocking of a thickness of 1 / inches (38 mm) or structed in accordance with Figure R602.10.6.2.
2
greater. R602.10.6.3 Method PFG: Portal frame at garage
Exceptions: door openings in Seismic Design Categories A, B
1. For methods WSP and CS-WSP, blocking of and C. Where supporting a roof or one story and a
horizontal joints is permitted to be omitted roof, a Method PFG braced wall panel constructed in
when adjustment factor No. 8 of Table accordance with Figure R602.10.6.3 shall be permitted
R602.10.3(2) or No. 9 of Table R602.10.3(4) on either side of garage door openings.
is applied. R602.10.6.4 Method CS-PF: Continuously sheathed
2. Vertical joints of panel sheathing shall be per- portal frame. Continuously sheathed portal frame
mitted to occur over double studs, where braced wall panels shall be constructed in accordance
adjoining panel edges are attached to separate with Figure R602.10.6.4 and Table R602.10.6.4. The
studs with the required panel edge fastening number of continuously sheathed portal frame panels in
schedule, and the adjacent studs are attached a single braced wall line shall not exceed four.
together with two rows of 10d box nails [3
inches by 0.128 inch (76.2 mm by 3.25 mm)]
at 10 inches o.c. (254 mm).

204 2018 INTERNATIONAL RESIDENTIAL CODE ®
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