Patent ID: 8230657

Claim:
A composite joist floor system comprising: a first supporting structure; a second supporting structure; a plurality of joists spaced apart from one another and extending from the first supporting structure to the second supporting structure; decking supported by the plurality of joists, wherein the decking is corrugated to form a plurality of peaks and valleys, wherein the peaks and valleys run substantially perpendicular to the plurality of joists; a plurality of stand-off fasteners for fastening the decking to the plurality of joists, wherein the stand-off fasteners each comprise a lower portion and an upper portion, the lower portion having a greater degree of hardness than that of the upper portion, and wherein, when installed, at least a portion of the upper portion of each stand-off fastener extends significantly above the decking; a generally z-shaped closure having a generally vertical face, a generally horizontal upper flange, and a generally horizontal lower flange, wherein the generally vertical face extends upwards past an upper most portion of the joist such that the generally horizontal upper flange can extend in a first direction over one or more peaks in the decking, wherein the z-shaped closure has a cutout that allows the z-shaped closure to surround at least a portion of a joist; and a cementitious slab supported by the decking and encapsulating the portion of each stand-off fastener extending above the decking.