Factored Wind LC: 1.05D + 1.28L + 1.28S + 1.6W
This load combination is intended for checking the strength limit state with applied wind and live loads. The load factors used are:
Hyperstatic Loading: 1.0 (std & alt)
Dead Loading: 1.05 (std) & 0.9 (alt)
Live Loading: 1.28 (std) & 0.0 (alt)
Snow Loading: 1.28 (std) & 0.0 (alt)
Service Wind Loading: 1.6 (std & alt)
Note: Since directionality factors were introduced in ASCE 7-98, the wind portion of the "Factored Wind LC: 1.05D + 1.28L + 1.28S + 1.6W" load combination has been increased to 1.6 to account for this effect. The need for this change is described in detail in ACI-02 9.2.1(b) and commentary. If directionality factors are not applied to the wind loads, the wind factors may be reduced in accordance with the original ACI 318-99 combinations.