Patent ID: 8468774

Claim:
A method of constructing a beam, the method comprising: providing a first flange and a second flange defining a central beam axis, wherein the first flange and the second flange each have a rectangular cross-section and each comprise a front surface, a back surface parallel to the front surface, a top surface, and a bottom surface parallel to the top surface; providing a number of separately formed web sections each having two convergent side walls and a central wall extending between converging ends of the side walls, wherein the central wall includes a strengthening structure extending along the central wall perpendicular to the central beam axis, the strengthening structure comprising a fold in the central wall; arranging the web sections side by side in an alternating arrangement wherein the central walls of adjacent web sections are spaced substantially parallel to each other and are transversely staggered relative to the central beam axis; connecting the side walls of adjacent web sections to one another; and connecting the web sections to both the first flange and second flange.