Composite steel and concrete truss floor construction

Claim 1

In a composite steel truss and concrete floor construction having spaced-apart secondary steel open web truss framing members supported at their ends on primary framing members, and further including steel decking means and a concrete slab extending between said secondary members, the improvements comprising: (a) top chord means for said secondary open web truss framing members having a top flange, bottom flange and interconnecting web, said bottom flange including a generally flat, planar steel deck supporting surface on each side of and extending from said interconnecting web and sufficiently wide to present a predetermined amount of supporting surface for support of said steel decking means, said steel decking means having end edges spaced generally horizontally outwardly away from said interconnecting web a predetermined distance, (b) bottom chord means for said secondary open web truss framing members and open frame web means structurally interconnecting said top and bottom chord means, (c) said concrete slab means being formed so as to extend from said steel decking and generally from said bottom flange upwardly to embed all of said interconnecting web means and said top flange of said top chord means in said concrete to a level above said top flange means and thereby causing said top chord means to function as a continuous shear transfer connector means in said composite floor construction, (d) said decking having alternate ridge and valley portions and wherein closure members are disposed under each of said ridge portions to prevent leakage of wet concrete from beneath said decking, and (e) said closure members being disposed under said ridge portions of said decking so that concrete beneath said ridge portions is disposed over substantially the entire width of said bottom flange.