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A roof diaphragm shall be provided by attaching not less than 3/8-inch (9.5 mm) wood structural panel that complies with Section R803 to roof rafters or truss top chords in accordance with Table R804.3. Buildings with 3:1 or larger plan aspect ratio and with roof rafter slope (pitch) of 9:12 or larger shall have the roof rafters and ceiling joists blocked in accordance with Figure R804.3.7.2.




For SI: 1 mil = 0.0254 mm, 1 inch = 25.4 mm, 1 foot = 304.8 mm.
FIGURE R804.3.7.2
ROOF BLOCKING DETAIL

Related Code Sections

R804.3.7.2 Roof-Ceiling Construction, Roof Diaphragm
A roof diaphragm shall be provided by attaching not less than 3/8-inch (9.5 mm) wood structural panel that complies with Section R803 to roof rafters ...