I am designing a masonry addition with a small mezzanine inside. My walls are designed to span between the slab and the roof, the mezzanine diaphragm is not supporting the masonry wall. However, my masonry wall is supporting the mezzanine floor by a ledger. ASCE 7-05 12.11 gives the out of plane anchorage forces for structural walls. This section specifies the out of plane attachment forces required for diaphragms that support the walls. Do these forces still apply in my situation? In the past I have used the same anchorage forces because I couldn't find anywhere else that specifies differently. In this case the mezzanine is extremely small, so the strapping and bolting to resist the out of plane bending on the ledger seems excessive. Am I overkilling this?
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