Structural member and method of making by cold rolling followed by induction or resistance welding

摘要

PCT No. PCT/AU91/00442 Sec. 371 Date May 20, 1993 Sec. 102(e) Date May 20, 1993 PCT Filed Sep. 25, 1991 PCT Pub. No. WO92/05895 PCT Pub. Date Apr. 16, 1992.A multiple component structural member is made by cold roll forming two continuous strips of metal on opposite sides of a third continuous strip of metal. The cold rolling process creates two hollow flange elements with a continuous aperture in which the edges of the third continuous strip of metal is partly extended, followed by resistance or induction welding to create the multiple component structural member.