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WOOD

WHERE FOOTING SECTION “A” IS MORE THAN 8′-0″
PROVIDE METAL TIE 16GA x 1½″ x 4′-0″ MIN., EACH SIDE
2′-0″ MIN. W/8-16d COMMON NAILS
SILL PLATE EACH SIDE OF SPLICE
SPLICE 2-2x PLATE

CONCRETE
STEPPED FOOTING 2x CRIPPLED
STUD WALL

FOOTING SECTION “A”

NOTE: WHERE FOOTING SECTION “A”
IS LESS THAN 8′-0″ LONG IN A
25′-0″ TOTAL LENGTH WALL, PROVIDE
BRACING AT CRIPPLE STUD WALL
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
FIGURE 2308.6.8.3
STEPPED FOOTING CONNECTION DETAILS

shall be provided at the ends of each rafters and ceiling joists such as ridge board, hips and valleys
braced wall panel for the first story to shall be designed as beams.
the foundation connection. In all cases, 2308.7.1 Ceiling joist spans. Spans for ceiling joists shall
the hold-down connector force shall be be in accordance with Table 2308.7.1(1) or 2308.7.1(2).
transferred to the foundation. For other grades and species, and other loading conditions,
3.4. Cripple walls shall not be permitted. refer to the AWC STJR.
2308.6.10.2 Limitations of concrete or masonry in 2308.7.2 Rafter spans. Spans for rafters shall be in accor-
Seismic Design Categories D and E. In Seismic dance with Table 2308.7.2(1), 2308.7.2(2), 2308.7.2(3),
Design Categories D and E, concrete or masonry walls 2308.7.2(4), 2308.7.2(5) or 2308.7.2(6). For other grades
and stone or masonry veneer shall not extend above a and species and other loading conditions, refer to the
basement. AWC STJR. The span of each rafter shall be measured
along the horizontal projection of the rafter.
Exception: In structures assigned to Seismic Design
Category D, stone and masonry veneer is permitted 2308.7.3 Ceiling joist and rafter framing. Rafters shall
to be used in the first story above grade plane, pro- be framed directly opposite each other at the ridge. There
vided that the following criteria are met: shall be a ridge board not less than 1-inch (25 mm) nomi-
1. Type of brace in accordance with Section nal thickness at ridges and not less in depth than the cut
2308.6.1 shall be WSP and the allowable shear end of the rafter. At valleys and hips, there shall be a sin-
capacity in accordance with Section 2306.3 gle valley or hip rafter not less than 2-inch (51 mm) nomi-
shall be not less than 350 plf (5108 N/m). nal thickness and not less in depth than the cut end of the
2. The braced wall panels in the first story shall rafter.
be located at each end of the braced wall line 2308.7.3.1 Ceiling joist and rafter connections. Ceil-
and not more than 25 feet (7620 mm) on cen- ing joists and rafters shall be nailed to each other and
ter, and the total length of braced wall panels the assembly shall be nailed to the top wall plate in
shall be not less than 45 percent of the braced accordance with Tables 2304.10.1 and 2308.7.5. Ceil-
wall line length. ing joists shall be continuous or securely joined where
3. Hold-down connectors shall be provided at the they meet over interior partitions and be fastened to
adjacent rafters in accordance with Tables 2304.10.1
ends of braced walls for the first floor to foun- and 2308.7.3.1 to provide a continuous rafter tie across
dation with an allowable capacity of 2,100 the building where such joists are parallel to the rafters.
pounds (9341 N). Ceiling joists shall have a bearing surface of not less
4. Cripple walls shall not be permitted. than 1 / inches (38 mm) on the top plate at each end.
1
2
2308.7 Roof and ceiling framing. The framing details Where ceiling joists are not parallel to rafters, an
required in this section apply to roofs having a slope of not equivalent rafter tie shall be installed in a manner to
less than three units vertical in 12 units horizontal (25-percent provide a continuous tie across the building, at a spac-
slope). Where the roof slope is less than three units vertical in ing of not more than 4 feet (1219 mm) on center. The
12 units horizontal (25-percent slope), members supporting connections shall be in accordance with Tables
2308.7.3.1 and 2304.10.1, or connections of equivalent

532 2018 INTERNATIONAL BUILDING CODE ®
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