Bygningselement og en fremgangsmåte for fremstilling av dette

摘要

A structural member which comprises a pair of hollow end sections and an intermediate web characterized in that each hollow end section is welded to the intermediate web so as to form two weld lines or joins extending along the structural member. Suitably the intermediate web is predominantly planar and the structural member is formed from a unitary sheet of metal having opposed edges whereby a respective edge is located adjacent said intermediate web and is welded thereto to form said weld lines or weld joins. The invention also includes within its scope a process for forming the structural member including the following steps: (i) passing substantially planar metal strip through a plurality of forming stations to successively deform opposed free edges of the metal strip so as to provide a pair of substantially hollow end sections wherein a respective free edge is located adjacent to an intermediate web interposed between each substantially hollow end section; and (ii) welding the respective free edge to the intermediate web to form two weld lines or joins extending along the structural member.