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WOOD

2308.4.9 Floor framing supporting braced wall panels. to the primary structure at not more than 8 feet (2438 mm)
Where braced wall panels are supported by cantilevered on center or shall be designed for lateral forces. Such
floors or are set back from the floor joist support, the floor attachment shall not be accomplished by use of toenails or
framing shall comply with Section 2308.6.7. nails subject to withdrawal.
2308.4.10 Anchorage of exterior means of egress com- 2308.5 Wall construction. Walls of conventional light-frame
ponents in Seismic Design Categories D and E. Exterior construction shall be in accordance with this section.
egress balconies, exterior stairways and ramps and similar 2308.5.1 Stud size, height and spacing. The size, height
means of egress components in structures assigned to Seis- and spacing of studs shall be in accordance with Table
mic Design Category D or E shall be positively anchored 2308.5.1.

MORE THAN b2/2
IS IRREGULAR

MORE THAN b1/2
IS IRREGULAR
b1
b2

PLAN VIEW PLAN VIEW
FIGURE 2308.4.4.1(2)
OPENING LIMITATIONS FOR FLOOR AND ROOF DIAPHRAGMS

FLOOR JOISTS
CANNOT BE
TIED DIRECTLY
TOGETHER

SECTION VIEW SECTION VIEW
FIGURE 2308.4.4.2
PORTIONS OF FLOOR LEVEL OFFSET VERTICALLY

TABLE 2308.5.1
SIZE, HEIGHT AND SPACING OF WOOD STUDS c
BEARING WALLS NONBEARING WALLS
STUD SIZE Supporting roof Supporting one floor, Supporting two floors,
(inches) Laterally unsupported and ceiling only roof and ceiling roof and ceiling Laterally unsupported Spacing
a
a
stud height (feet) stud height (feet) (inches)
Spacing (inches)
2 × 3 b — — — — 1 0 1 6
2 × 4 10 24 16 — 14 24
3 × 4 10 24 24 16 14 24
2 × 5 10 24 24 — 16 24
2 × 6 10 24 24 16 20 24
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
a. Listed heights are distances between points of lateral support placed perpendicular to the plane of the wall. Increases in unsupported height are permitted
where justified by an analysis.
b. Shall not be used in exterior walls.
c. Utility-grade studs shall not be spaced more than 16 inches on center or support more than a roof and ceiling, or exceed 8 feet in height for exterior walls and
load-bearing walls or 10 feet for interior nonload-bearing walls.

518 2018 INTERNATIONAL BUILDING CODE ®
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