Upper chord bearing cold-formed steel joists

Details Upper chord bearing cold-formed steel joists Upper chord bearing cold-formed steel joists

E - Fixed Constructions

04

C

E04C 3/08 (2006.01) B21D 47/01 (2006.01) B21D 53/00 (2006.01) E04B 5/10 (2006.01)

Patent

CA 2542848

An upper chord bearing joist (20) comprises an upper elongate chord member (22) cold-formed from a unitary piece of sheet steel, the upper chord member (22) having a flange portion and a web receiving portion orthogonal thereto and the web receiving portion having two web receiving tabs (46, 48) and a pair of inner flange portions (45, 47), each inner flange portion extending outward from one of the web receiving tabs respectively; a lower elongate chord member (24), wherein the upper chord member (22) extends longitudinally beyond the lower chord member (24) at each end thereof; and a generally planar steel web (26) attached to the web receiving portion of the upper chord member (22) between the two web receiving tabs (46, 48) and attached to the lower chord member (24). A plurality of upper chord bearing joists may form a supporting system for use in composite floor and roof systems.

L'invention concerne une poutrelle comprenant au moins un élément de membrure allongé en acier formé à froid; une armature en acier formée à froid présentant une pluralité d'éléments et des moyens permettant de fixer celle-ci sur l'élément de membrure. Une pluralité de poutrelles est à utiliser, en général, dans un système support destiné à une plate-forme ou une terrasse dans la construction de planchers et de toits. Le système support peut être spécialement utilisé dans des systèmes de plancher et de toit composites.

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