Elongate cold-formed structural member, e.g. a purlin

摘要

A structural member having a pair of spaced generally parallel flanges 11, 12 being reinforced at one edge 13, 14 and interconnected by a web 18 at their other edges 24, 25. the web 18 having a median portion 19 generally orthogonal to the flanges but offset from their edges, is characterized in that at least one flange has a reinforcing portion in the form of a generally closed section 15 at one edge. Section 15 may be almost closed, as shown, or may be actually closed, and may be of square, oblong, triangular or circular cross-section; either or both of the flanges and webs may have reinforcement in the form of depressed or raised channels and the like; the flanges may be both on the same side of the web as shown, or on opposite sides. IMAGE