Abstract:
A structural member for a building, the structural member comprising: at least two spaced apart sidewalls, each sidewall formed from at least one contoured metal sheet; and at least one connecting vertex through which the sidewalls are connected, each connecting vertex include at least one structural bend formed in at least one of the contoured metal sheets, the sidewalls being connected through the connecting vertex to form a structural span therebetween, wherein each structural bend is formed between a first sheet section and a second sheet section of the respective contoured metal sheet, the first sheet section and second sheet section being connected about a bend line with the first sheet section extending from the bend line at a selected angle relative to the second sheet section, and wherein the first sheet section has a contoured profile that is a symmetrical mirror of the contoured profile to the second sheet section about the bend line.
Abstract:
A method of bending a contoured metal sheet about a selected fold line. The contoured metal sheet has a longitudinal axis extending along the length of the sheet, and a contoured profile that extends perpendicular to the longitudinal axis of the sheet. The method comprises: engaging a first sheet section of the contoured metal sheet with a forming member which comprises a forming surface having a contour shaped with a substantially symmetrical mirror profile to the contoured profile of the first sheet section. The engagement of the forming member with the first sheet section bends the first sheet section of the metal sheet about a fold line relative to a second sheet section of the metal sheet to position the first sheet section at a selected angle relative to the second sheet section about the fold line, and also transforms the contoured profile of the first sheet section into a new contoured profile comprising a symmetrical mirror of the contoured profile of the second sheet section about the fold line.