Patent ID: 6973881

Claim:
A plank for use in a nailable metal floor structure, the plank comprising: a web portion having a first end, a second end disposed opposite from the first end, a top surface and a bottom surface; a first side flange extending from the first end of the web portion and wherein the first side flange is convex; a second side flange extending from the second end of the web portion and wherein the second side flange is concave; a first bottom flange connected to the first side flange and extending substantially parallel to the web portion; a second bottom flange connected to the second side flange and extending substantially parallel to the web portion; a first central portion having an end extending from the first bottom flange to the bottom surface of the web portion such that the end contacts the bottom surface of the web and is welded to the bottom surface of the web; a second central portion having an end extending from the second bottom flange to the bottom surface of the web portion such that the end contacts the bottom surface of the web and is welded to the bottom surface of the web; and wherein the plank is formed from a one-piece construction.