Concrete floor with embedded projecting truss

Claim 1

A COMPOSITE PLATFORM COMPRISING: PARALLEL, SPACED APART TRUSSES, EACH OF SAID TRUSSES INCLUDING: A MAIN BEAM THAT HAS A GENERALLY HORIZONTAL TOP FLANGE, A GENERALLY VERTICAL WEB, SAID WEB BEING OF VARIABLE DEPTH ALONG ITS LENGTH, AND A FLANGE PLATE ATTACHED TO THE BOTTOM OF SAID WEB, SAID MAIN BEAM HAVING A RECESS IN ITS BOTTOM EDGE, A BAR EXTENDING LENGTHWISE ALONG A PORTION OF THE LENGTH OF SAID MAIN BEAM, THE ENDS OF SAID BAR BEING CONNECTED TO SAID BOTTOM EDGE OF THE MAIN BEAM AND SAID BAR HAVING SAID ENDS DISPOSED ABOVE ITS MIDDLE PORTION AND BEING PLACED WITH SAID MIDDLE PORTION SUBSTANTIALLY IN VERTICAL ALIGNMENT WITH THE PORTION OF THE RECESS IN SAID BOTTOM EDGE CLOSEST TO THE TOP FLANGE OF SAID MAIN BEAM, AND A SUBSTANTIALLY VERTICAL STRUT EXTENDING UPWARDLY FROM THE SAID MIDDLE PORTION OF SAID BAR TO THE BOTTOM EDGE OF SAID MAIN BEAM, A SHEET OF METAL SUPPORTED UPON THE BOTTOM FLANGE PLATES OF TWO ADJACENT TRUSSES, AND A CONCRETE PLATFORM SUPPORTED ON SAID SHEET, THE WEBS OF SAID ADJACENT TRUSSES BEING EMBEDDED IB SAID PLATFORM.