For both allowable stress design and strength design methods where specifically required by Section 1605.1 or by Chapters 18 through 23, elements and components shall be designed to resist the forces calculated using Equation 16-22 when the effects of the seismic ground motion are additive to gravity forces and those calculated using Equation 16-23 when the effects of the seismic ground motion counteract gravity forces.
|1.2D + f1L + Em||(Equation 16-22)|
|0.9D + Em||(Equation 16-23)|
|Em||=||The maximum effect of horizontal and vertical forces as set forth in Section 12.4.3 of ASCE 7.|
|f1||=||1 for floors in places of public assembly, for live loads in excess of 100 psf (4.79 kN/m2) and for parking garage live load, or|
|=||0.5 for other live loads.|