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Pre-cast Modular Building Shear Wall Reinforcing

Pre-cast Modular Building Shear Wall Reinforcing

Pre-cast Modular Building Shear Wall Reinforcing

(OP)
I am looking for an opinion on the following:  In designing single story modular pre-cast buildings (load bearing concrete shear walls) that can be located in a zone 4 area, we design for worst case scenarios (soils info not generally provided).  According to IBC2000, we get directed into a performance category D, which dictates specially reinforced concrete shear walls. ACI318-99 21.6 seems to require extensive reinforing in the walls that are not economical for the precaster.  The buildings are not classified as occupied and are a low hazard to life-safety.  This seems to be an overly conservative approach.

Any thoughts?

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