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Seismic Base

Seismic Base

Seismic Base

(OP)
I have a light framed one story building with concrete foundation.  The building is located on a sloping lot which allows for full walk out in the back that will be store fronts made with steel moment frames.  Retaining walls allow for full height soil at each end and front of the building. My question is at what level do I consider my base for seismic shear. I believe I should be using the first floor level located at the high soil line at the front and sides of the building.  Any thoughts?  

RE: Seismic Base

See section C11-1 of ASCE 7-05.

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