When determining the effective seismic weight, ASCE 12.7, do you include portions of the building isolated from the seismic force resisting system? For instance, in a one story building with a floor slab that is isolated from the outside walls (shear wall system) is it necessary to include the weight of the slab + equipment into the calculation of W? Although the definition given says to include weight of permanent equipment, this seems unnecessary if that weight isn't being transferred into the lateral force system.
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