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—0 DEPARTMENT OF COMMERCE Comm 21.25
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b. Where the bracing percentage provided is at least twice the d. Each panel end stud shall have a tie —down device fastened
minimum percentage required by Table 21.25 —H, blocking at hor- to the foundation, capable of providing an uplift capacity in
izontal joints is not required in braced wall panels using methods accordance with Table 21.25 —I.
par. (b) 4., 5. or 6. e. The tie —down device shall be installed in accordance with
(9) ALTERNATIVE BRACING METHODS AND MODIFICATIONS. (a) the manufacturer's recommendations.
General. As an alternative to the bracing methods under sub. (8), f. The panels shall be supported directly on a foundation or
the wall bracing methods in this subsection may also be used. on floor framing supported directly on a foundation, which is con-
tinuous across the entire length of the braced wall line.
(b) Alternate braced wall panels. 1. `General.' Alternate g. This foundation shall be reinforced with not less than one
braced wall panels constructed in accordance with subd. 2., 3., 4. number 4 bar at the top and bottom.
or 5. may replace each 4 feet of braced wall panel as required h. When the continuous foundation is required to have a depth
under sub. (8) (b). The maximum height and minimum length of greater than 12 inches a minimum 12— inch —by -12 —inch continu-
each panel shall be in accordance with Table 21.25 —I. ous footing or turned down slab edge is permitted at door openings
2. 'Supporting roof only.' a. In one —story buildings, each in the braced wall line.
panel shall be sheathed on one face with 3 /s— inch minimum— i. This continuous footing or turned down slab edge shall be
thickness wood structural panel sheathing nailed with 8d common reinforced with not less than one number 4 bar at the top and bot-
or galvanized box nails in accordance with the fastening table in tom.
the appendix and blocked at all wood structural panel sheathing j. This reinforcement shall be lapped 15 inches with the rein
edges. forcement required in the continuous foundation located directly
b. Two anchor bolts installed in accordance with s. Comm under the braced wall line.
21.18 (1) (c) 3. shall be provided in each panel. 3. 'Supporting floor and roof only.' In the first story of two
story buildings, each graced wall panel shall be in accordance
c. Anchor bolts shall be placed 6 to 12 inches from each end with subd. 1., except that the wood structural panel sheathing edge
of the plate. nailing spacing shall not exceed four inches on center.
TABLE 21.25 —I
MINIMUM LENGTH REQUIREMENTS AND TIE —DOWN FORCES FOR ALTERNATE BRACED WALL PANELS
Height of Braced Wall Panel
8ft 9ft. 10 ft. 11 ft. 12 ft
Sheathed Length 2'-4" 2'_8" 2'_8" 3'_2" 3' -6"
Sub. (9) (b) 2. Tie —down Force (lbs) C 1800 1800 2000 2200
Sub. (9) (b) 3. Tie —down Force (lbs) 3000 3000 3000 3300 3600
4. 'Alternate bracing method with Extended Header over k. Where a panel is located on one side of the opening, the
Opening and Tie Downs, supporting a roof only.' a. Each panel header shall extend between the inside face of the first full length
shall have a length of not less than 16 inches and a height of not stud of the panel and the bearing studs at the other end of the open
more than 10 feet. ing.
b. Each panel shall be sheathed on one face with a single layer L. The bearing studs shall also have a tie -down device fas-
of 3 /8 —inch— minimum thickness wood structural panel sheathing tened to the foundation with an uplift capacity of not less than
nailed with 8d common or galvanized box nails in accordance 1,000 pounds.
with Figure 21.25 —E. m. The tie —down devices shall be an embedded —strap type,
c. The wood structural panel sheathing shall extend up over installed in accordance with the manufacturer's recommenda-
the header and shall be nailed in accordance with Figure 21.25 —E. lions. R
d. Glue laminated beams, LVL's or a built —up header consist- n. The panel's shall be supported directly on a foundation,
t ab of at least two 2 x 12s fastened in accordance with the fastener which is continuous across the entire length of the braced wall
table in the appendix may be used.' line
e. A spacer, if used, shall be placed on the side of the built —up
beam opposite the wood structural panel sheathing. o. The foundation shall be reinforced with not less than one
f. The header shall extend between the inside faces of the first number 4 bar top and bottom.
full— length outer studs of each panel. p. Where the continuous foundation is required to have a
g. The clear span of the header between the inner studs of each depth greater than 12 inches, a minimum 12— inch —by -12 —inch
panel shall be not less than 6 feet and not more than 18 feet in continuous footing or turned down slab edge is permitted at door
length. openings in the braced wall line.
i
h strap with an uplift capacity less than 1,000 pounds q. -This- continuous- footing -or -turned down slab- edge -shall be
shall fasten the header to the side of the inner studs opposite the reinforced with not less than one number 4 bar top and bottom.
sheathing. r. This reinforcement shall be lapped not less than 15 inches
i. One anchor bolt not less than 5 /8— inch diameter, installed with the reinforcement required in the continuous foundation
in accordance with s. Comm 21.18 (1) (c) 3. shall be provided in located directly under the braced wall line.
the center of each sill plate. 5. 'Alternate' bracing method with Extended Header Over
j. The studs at each end of the panel shall have a tie —down Opening and Tie Downs, in a wall supporting a floor and roof
device fastened to the foundation with an uplift capacity of not less only.' Each wall panel shall be braced in accordance with subd.
than 4,200 pounds. 4., except that each panel shall have a length of at least 24 inches.
Register Apri12009 No. 640