Patent ID: 8381469

Claim:
An upper chord for a cold formed metal joist having an upper chord, a lower chord and a web portion disposed therebetween, the upper chord comprising: a first longitudinally extending downwardly opening channel formed therein sized and shaped to receive thereinto an upper edge of said web portion, said first longitudinal channel being formed along said chord's longitudinal centre line; two second longitudinally extending channels each arranged parallel to said first channel, each of said two second channels being disposed on a different side of said first channel, each second channel comprising an upward opening open along the entire longitudinal extent thereof and of sufficient width to directly receive a hardenable fluid applied thereto; and a flange portion to provide said upper chord with a substantially horizontal load engaging surface, wherein said flange portion extends laterally outwardly from each of said two second channels, and wherein said flange portion comprises a first horizontal portion and a second projecting portion bent upwardly at a predetermined angle relative to said horizontal portion; wherein upon application of the hardenable fluid to the upper chord, the hardenable fluid is received in the upward opening of each second channel and hardens within each second channel to form a hardened fluid, such that movement between the upper chord and the hardened fluid is restricted.