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Draft Curtain Gap @ Corrugated Roof Deck

Question asked by piersj on Jul 19, 2017
Latest reply on Jul 20, 2017 by cdafd

Draft Curtains.

In a building with a corrugated metal roof deck what is the permissible gap at the top of the draft curtain? Would small alternating gaps of the corrugated decking need to be filled no mater the size? NFPA 13 reference a gap above 3" high effects the sprinkler deflector distance to the ceiling but does a typical gap created by the corrugated deck effect the performance of the draft curtain.