Page 237 - 2018_IRC

WALL CONSTRUCTION

EXTENT OF TOP
EXTENT OF STORY BRACED
WALL PANEL
ALIGNED BRACED
WALL PANELS EXTENT OF MIDDLE
STORY BRACED
EDGE OF WALL PANEL
SHEATHING EXTENT OF BOTTOM
TO BRACED STORY BRACED
WALL PANEL WALL PANEL
END POST, TYP.
BRACED WALL GABLE END
FRAMING
PANEL
SINGLE-STORY BRACED WALL
PANEL
HOLD-DOWN
FORCE SINGLE-STORY HOLD-
-TOP STORY DOWN FORCE-TOP
STORY
BRACED WALL
HOLD DOWNS PANEL
ON SAME POST
OR STUD TOP
AND BOTTOM HOLD DOWN
CUMULATIVE -SEE NOTE BELOW
HOLD-DOWN
FORCE SINGLE-STORY
-MIDDLE STORY HOLD-DOWN FORCE
-MIDDLE STORY
BRACED WALL BRACED WALL
PANEL PANEL
CUMULATIVE
HOLD-DOWN SINGLE-STORY HOLD-
FORCE DOWN FORCE
-BOTTOM STORY -BOTTOM STORY
HOLD-DOWN CUMULATIVE HOLD-
-SEE NOTE BELOW DOWN FORCE
-BOTTOM OF TWO-
(a) (b)
STORY
(a) Braced wall panels stacked (aligned story (b) Braced wall panels mixed stacked and not
to story). Use cumulative hold-down force. stacked. Use hold-down force as noted.
Note: Hold downs should be strap ties, tension ties, or other approved hold-down devices and shall be
installed in accordance with the manufacturer’s instructions.
FIGURE R602.10.6.5
METHOD BV-WSP—WALL BRACING FOR DWELLINGS WITH STONE AND
MASONRY VENEER IN SEISMIC DESIGN CATEGORIES D , D and D 2
0
1
R602.10.6.5.1 Length of bracing. The length of R602.10.7 Ends of braced wall lines with continuous
bracing along each braced wall line shall be the sheathing. Each end of a braced wall line with continu-
greater of that required by the ultimate design wind ous sheathing shall have one of the conditions shown in
speed and braced wall line spacing in accordance Figure R602.10.7.
with Table R602.10.3(1) as adjusted by the factors in
Table R602.10.3(2) or the seismic design category R602.10.8 Braced wall panel connections. Braced wall
panels shall be connected to floor framing or foundations
and braced wall line length in accordance with Table as follows:
R602.10.6.5. Angled walls shall be permitted to be
counted in accordance with Section R602.10.1.4, and 1. Where joists are perpendicular to a braced wall
braced wall panel location shall be in accordance panel above or below, a rim joist, band joist or
with Section R602.10.2.2. Spacing between braced blocking shall be provided along the entire length of
wall lines shall be in accordance with Table the braced wall panel in accordance with Figure
R602.10.1.3. The seismic adjustment factors in Table R602.10.8(1). Fastening of top and bottom wall
R602.10.3(4) shall not be applied to the length of plates to framing, rim joist, band joist or blocking
bracing determined using Table R602.10.6.5, except shall be in accordance with Table R602.3(1).
that the bracing amount increase for braced wall line 2. Where joists are parallel to a braced wall panel
spacing greater than 25 feet (7620 mm) in accordance above or below, a rim joist, end joist or other paral-
with Table R602.10.1.3 shall be required. The mini- lel framing member shall be provided directly above
mum total length of bracing in a braced wall line, and below the braced wall panel in accordance with
after all adjustments have been taken, shall be not less Figure R602.10.8(2). Where a parallel framing
than 48 inches (1219 mm) total. member cannot be located directly above and below

212 2018 INTERNATIONAL RESIDENTIAL CODE ®
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