The wall contractor brought up this issue. But we did not use the reduced value of anchor in cracked concrete for blast load (the worse case controls the design). we did use approved anchors for cracked concrete. if we use approved anchors (for cracked concrete), Do we need to use reduced capacity of anchors in cracked conrete? Due to the blast load, the demand of anchor capacity is unreasonably high.Īctually, A/E has approved the shop drawings. Do we need to use those anchors approved for cracked concrete?ģ. Are we expecting concrete floor to crack?Ģ. I have some questions about the anchor of steel studs to the concrete floor and the under side of metal deck (into concrete through metal deck).ġ. The building is under Category IV, seismic design category D, and some parts of exterior wall are subjected to blast load. The floor and roof are light weight concrete on metal deck (diaphgram). The lateral resistant system of the 5-story building is special steel moment frame. We are designing exterior steel stud walls for a military hospital.
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