Patent ID: 7389620
Filing Date: 2008-06-24
Classification: E04B

Abstract:
1. In a composite beam-joist system, comprising: (a) a substantially horizontally positioned beam structure support member having a top surface; (b) at least two open-web joists, said open-web joists being positioned a spaced distance apart and being substantially parallel to one another and perpendicular to said beam, each one of said open-web joists being comprised of a zigzag shaped iron rod connecting a top chord and a bottom chord, said top and bottom chords being positioned a spaced distance apart and substantially parallel to each other, each one of said top and bottom chords being comprised of a pair of opposed angle iron members affixed together by connection to apices in said zigzag shaped rod, said pair of opposed angle iron members forming said top chord for each open-web joist having a first end; (c) each of said open-web joists having a bearing end on at least one end, said bearing end being comprised of a pair of flange connected seat angles extending laterally from the respective first end of each one of said opposed angle iron members of said top chord so as to form a pair of U shaped channels at said bearing end, a front end of said bearing ends of each of said open-web joists being placed on a top surface of said beam; (d) corrugated decking being positioned on a top surface of said top chords of said open-web joists said corrugated decking including a plurality of flutes extending parallel to each other and to a longitudinal axis of said horizontally positioned beam structure support member, said corrugated decking having an edge parallel to the longitudinal axis of said horizontally positioned beam structure support member; and (e) one or more shear studs being affixed to said top surface of said beam adjacent said open-web joist bearing ends; the improvement comprising an end connection means disposed between said at least two open-web joists, (f) said end connection means including a composite pan, said composite pan formed from a substantially rectangular piece of material having a width approximately equal to the spaced distance between said at least two open-web joists and having a plurality of substantially rectangularly shaped segments including a horizontal top surface segment, a horizontal flange segment and a vertical panel segment disposed between, confluent with and substantially perpendicular to each of said horizontal top surface segment and horizontal flange segment, at least said vertical panel segment having no removal of material therefrom, that is, cut-out free, said horizontal top surface segment of said composite pan being positioned on and affixed to opposed top chord seat angles of adjacent open-web joists, said horizontal top surface of said composite pan extending from at least the edge of said corrugated decking to the respective first end of each of said pair of opposed angle iron members for each said open-web joist, such that said vertical panel is positioned at said respective first end of each of said pair of opposed angle iron members for each said open-web joist, said vertical panel extending downward a predetermined distance towards the top surface of said horizontally positioned beam structure support member such that said horizontal flange member is consequently positioned in a plane in close proximity and parallel to the top surface of said beam structure support member, whereby a substantially horizontal platform is formed between a respective adjacent pair of said open-web joists, the top surface of said beam, and the edge of said corrugated decking, so that when concrete is poured over said top surface of said beam, said composite pan, said bearing ends, said shear stud(s), and said corrugated decking, said beam is composite with a resulting concrete slab.