ORD 1869 - Laserfiche WebLink

0.9D ± El1.4 (12-10) D+O.75[L+(LrorS)+(WorE?l.4)] (12-11) No increase in allowable stresses shall be used with these load combinations except as specifically permitted elsewhere in this code-and the duration of load increase permitted in Division III of Chapter 23. Section 20.08.105 Section 1612.3.2 - amended - Alternate basic load combinations. Section 1612.3.2 of the California Building Standards Code 2001 Edition (24 C.C.R.), and including by reference the Uniform Building Code, is amended to read as follows: 1612.3.2 Alternate basic load combinations. In lieu of the basic load combinations specified in Section 1612.3.1, structures and portions thereof shall be permitted to be designed for the most critical effects resulting from the following load combinations. When using these alternate basic load combinations, a one-third increase shall be permitted in allowable stresses for all combinations including W or E. but not concurrent with the duration of load increase permitted in Division III of Chapter 23. D + L + (Lr or S) (12-12) D + L + (WorE~1.4) (12-13) D+L + W+S/2 (12-14) D +L + S+ W/2 (12-15) D + L + S + El1.4 (12-16) 0.9D ± El1.4 (12-16- 1) EXCEPTIONS: 1. Crane hook loads need not be combined with roof live load or with more than three fourths of the snow load or one half of the wind load. 2. Design snow loads of 30 psf (1.44 kN/m 2 ) or less need not be combined with seismic loads. Where design snow loads exceed 30 psf (1.44 kN/m 2 ), the design snow load shall be included with seismic loads, but may he reduced up to 75 percent where consideration of siting, configuration and load duration warrant when approved by the building official. Section 20.08.107 Section 1630.2.3.4 - amended - Horizontal Distribution 40