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SEC. 91.5.800. BASIC PROVISIONS.
   (Amended by Ord. No. 187,719, Eff. 1/23/23.)
 
   Chapter 8 of the CRC is hereby adopted by reference with the following exceptions, modifications and additions.
 
91.5.802.8. Lateral Support. Roof framing members and ceiling joists having a depth-to-thickness ratio exceeding 2 to 1 based on nominal dimensions shall be provided with lateral support at points of bearing to prevent rotation. For roof rafters with ceiling joists attached per CRC Table R602.3(1), the depth-thickness ratio for the total assembly shall be determined using the combined thickness of the rafter plus the attached ceiling joist. (Amended by Ord. No. 185,587, Eff. 7/16/18.)
 
91.5.802.10.2. Design. Wood trusses shall be designed in accordance with accepted engineering practice. The design and manufacture of metal-plate-connected wood trusses shall comply with ANSI/TPI 1. The truss design drawings shall be prepared by a registered professional.
 
91.5.803.2.4. Openings in Horizontal Diaphragms. Openings in horizontal diaphragms shall conform to LAMC Paragraph 91.5.503.2.4. (Amended by Ord. No. 185,587, Eff. 7/16/18.)