Patent ID: 9290940
Filing Date: 2016-03-22
CPC Classification: E04C

Claim Text:
1. A cold formed metal joist for use in composite and non-composite construction applications, the joist comprising: a web portion having an upper edge and a lower edge; a longitudinally extending lower chord fixedly connected to the lower edge of said web portion at a lower connection point for a strong load resistant connection thereto; and a longitudinally extending upper chord fixedly connected to the upper edge of said web portion at an upper connection point for a strong load resistant connection thereto; said upper chord comprising: at least one longitudinally extending continuous channel disposed laterally outward of the upper connection point and extending longitudinally substantially the entire length of the upper chord, said channel comprising a bottom wall, sidewalls and an upward opening continuously open along the entire longitudinal length thereof, the upward opening being of sufficient width to directly receive a hardenable fluid applied thereto, wherein at least one of said sidewalls is formed with a bulge therein for mechanically interlocking with said hardened fluid; and a flange portion providing said upper chord with a horizontal load engaging surface; wherein upon application of the hardenable fluid to the upper chord, the hardenable fluid is received in the upward opening of each channel and hardens within each channel to form a hardened fluid, such that movement between the upper chord and the hardened fluid is restricted.