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Sec. 9.61 SECTION 1612.3.1 OF THE BUILDING CODE AMENDED: Section <br />1612.3.1 of the Building Code is hereby amended to read as follows: <br /> <br /> Section 1612.3.1 Basic Load Combinations. Where allowable stress design <br /> (working stress design) is used, structures and all portions thereof shall resist the <br /> most critical effects resulting from the following combination of loads: <br /> <br /> O (12-7) <br /> D + L + (Lr or S) (12-8) <br /> D + (Wor EI1.4) (12-9) <br /> 0.9 + 0.75[L +(Lror S) + (Wor E/1.4)] (12-10) <br /> D + 0.75 [L +(Lror $) + (Wor El1.4)] (12-11) <br /> <br /> No increase in allowable stresses shall be used with these load combinations <br /> except as specifically permitted elsewhere in this code and the duration of load <br /> increase permitted in Division Ill of Chapter 23. <br /> <br /> Sec. 9.62 SECTION 1612.3.2 OF THE BUILDING CODE AMENDED: Section <br />1612.3.2 of the Building Code is hereby amended to read as follows: <br /> <br /> Section 1612.3.2 Alternate Basic Load Combinations. In lieu of the basic load <br /> combinations specified in Section 1612.3.1, structures and portions thereof shall <br /> be permitted to be designed for the most critical effects resulting from the <br /> following load combinations. When using these alternate basic load <br /> combinations, a one-third increase shall be permitted in allowable stresses for all <br /> combinations including W or E but not concurrent with the duration of load <br /> increase permitted in Division Ill of Chapter 23. <br /> <br /> D + L + (Lr or S) (12-12) <br /> D + L + (Wor El1.4) (12-13) <br /> D + L + W+ S/2 (12-14) <br /> D + L + S + WI2 (12-15) <br /> D + L + S + £11.4 (12-16) <br /> 0.9D + El1.4 (12-16-1) <br /> <br /> EXCEPTIONS: <br /> 1. Crane hook loads need not be combined with roof live load or with more than <br /> three fourths of the snow load or one half of the wind load. <br /> <br /> 2. Design snow loads of 30 psf (1.44 kN/m2) or less need not be combined with <br /> seismic loads. Where design snow loads exceed 30 psf (1.44 kN/m2), the design <br /> snow load shall be included with seismic loads, but may be reduced up to 75 <br /> percent where consideration of siting, configuration and load duration warrant <br /> when approved by the Building Official. <br /> <br /> Sec. 9.63 SECTION 1629.4.2 OF THE BUILDING CODE AMENDED: Section <br />1629.4.2 of the Building Code is hereby amended to read as follows: <br /> <br />Atty/Ord/Ord,167 <br />102402 6 <br /> <br /> <br />