SECTION 1605 LOAD COMBINATIONS

1605.2 Load combinations using strength design or load and resistance factor design.

1605.2.1 Basic load combinations. Where strength design or load and resistance factor design is used, structures and portions thereof shall resist the most critical effects from the following combinations of factored loads:

1.4 (D + F)                                                          (Equation 16-1)

1.2(D + F + T) + 1.6(L + H) + 0.5 (Lr or S or R)    (Equation 16-2)

1.2D+ 1.6(Lr or S or R) + (f1L or 0.8W)                (Equation 16-3)

1.2D+ 1.6W+ f1L + 0.5(Lr or S or R)                    (Equation 16-4)

1.2D+ 1.0E+ f1L + f2S                                       (Equation 16-5)

0.9D+ 1.6W+ 1.6H                                            (Equation 16-6)

0.9D+ 1.0E+ 1.6H                                             (Equation 16-7)

f1 = 1 for floors in places of public assembly, for live loads in excess of 100 pounds per square foot (4.79 kN/m2), and for parking garage live           load, and   

   = 0.5 for other live loads.  

f2 = 0.7 for roof configurations (such as saw tooth) that do not shed snow off the structure, and  

  = 0.2 for other roof configurations.

Exception: Where other factored load combinations are specifically required by the provisions of this code, such combinations shall take precedence.

1605.2.2 Other loads. Where Fa is to be considered in the design, the load combinations of Section 2.3.3 of ASCE 7 shall be used.

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