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// CODE SNIPPET

R804.3.7.2 Roof Diaphragm

Los Angeles Residential Code > 8 Roof-Ceiling Construction > R804 Cold-Formed Steel Roof Framing > R804.3 Roof Construction > R804.3.7 Ceiling and Roof Diaphragms > R804.3.7.2 Roof Diaphragm
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AMENDMENT
This section has been amended at the state or city level.
Openings in horizontal diaphragms shall conform to LAMC Paragraph 91.5.503.2.4.

R804.3.7.2 Roof Diaphragm

A roof diaphragm shall be provided by attaching a minimum of 3/8-inch (9.5 mm) wood structural panel which 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.
FIGURE R804.3.7.2
ROOF BLOCKING DETAIL

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R804.3.7.2 Roof-Ceiling Construction, Roof Diaphragm
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