Patent ID: 9702155
Date: 2017-07-11
CPC Classifications: E04B,E04D,E04G

Claim:
1. A method of retrofitting a substantially horizontal, composite strength concrete roof assembly comprising concrete over a corrugated steel deck, the corrugated deck defining a plurality of alternating upper and lower ribs, to form a substantially horizontal, dry-installed composite strength roof assembly, the method comprising: a) removing concrete from the corrugated deck of the composite strength concrete roof assembly, the corrugated deck having a length and a width; b) exposing the upper rib portions of the corrugated deck of the composite strength concrete roof assembly; c) exposing at least selected locations of the upper surfaces of the lower rib portions of the corrugated deck of the composite strength concrete roof assembly to permit fastening of the corrugated deck to an underlying horizontal support; d) mechanically fastening the corrugated deck of the composite strength concrete roof assembly to the underlying horizontal support at exposed locations of the lower rib portions; e) positioning a rigid sheet horizontally over the corrugated deck of the composite strength concrete roof assembly and spanning adjacent upper ribs of the corrugated deck; and f) mechanically fastening the rigid sheet to the upper rib portions of the corrugated deck of the composite strength concrete roof assembly using mechanical fasteners oriented to form a series of generally triangular-shaped, horizontally-disposed trusses and a series of vertically-disposed trusses the length and width of the corrugated deck.