Patent ID: 7721497

Claim:
A composite steel and concrete floor construction comprising: a poured concrete slab; a plurality of individual laterally placed, parallel disposed, and supported joists, wherein each of said plurality of joists comprises an upper chord and a lower chord joined by an intermediate web member, wherein at least a portion of said upper chord is embedded in said concrete slab; and wherein at least one of said upper chords of one of said plurality of joists comprises: a first horizontal leg portion and a first vertical leg portion, said first horizontal leg portion and said first vertical let portion being connected at a first central point, said first horizontal leg portion and said first vertical leg portion defining a substantially 90° angle; a second horizontal leg portion and a second vertical leg portion, said second horizontal leg portion and said second vertical leg portion being connected at a second central point, said second horizontal leg portion and said second vertical leg portion defining a substantially 90° angle; wherein said first horizontal leg portion and said second horizontal leg portion define a substantially 180° angle and wherein said first vertical leg portion depends upwardly from said first horizontal leg portion at said first central point and second vertical leg portion depends downwardly from said second horizontal leg portion at said second central point.