Light gauge metal truss system

E - Fixed Constructions – 04 – C

Patent

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Details

E04C 3/02 (2006.01) E04B 7/04 (2006.01) E04C 3/07 (2006.01) E04C 3/09 (2006.01) E04C 3/11 (2006.01) E04C 3/04 (2006.01)

Patent

CA 2294318

A light gauge metal truss system including trusses constructed of roll formed truss chord (10) and truss web (40) members and a two piece roll formed truss anchor (70) for anchoring the truss to a wall. The truss chord members are roll formed to have a generally U-shaped cross section with a base and two substantially parallel legs with reinforcement ribs and inwardly turned hems to improve structural capacity thus improving the strength-to-weight ratio of the chord member and minimizing costs (Fig. 1). The truss web members are roll formed to have an H-shaped cross section with the internal flange offset from the center of the legs to provide an enlarged attachment surface (Fig. 3). The web member also includes reverse folds and hems to improve structural capacity thus improving the strength-to-weight ratio of the web members and minimizing costs.

L'invention concerne un système de ferme métallique légère comprenant des fermes formées d'éléments profilés de membrure de ferme (10) et d'âme de ferme (40) et d'un élément profilé d'ancrage de ferme (70) en deux pièces permettant d'ancrer la ferme à une paroi. Les éléments de membrure de ferme sont profilés de manière à présenter une section transversale généralement en forme de U comportant une base et deux pieds sensiblement parallèles présentant des nervures de renforcement et des bords rabattus vers l'intérieur pour augmenter sa capacité structurale, ce qui permet d'améliorer le rapport solidité-poids de l'élément de membrure et de réduire les coûts (fig. 1). Les éléments d'âme de ferme sont profilés de manière à présenter une section transversale en forme de H, le rebord intérieur déviant du centre des pieds pour former une surface de fixation élargie (fig. 3). L'élément d'âme comprend également des courbures inversées destinées à augmenter sa capacité structurale ce qui permet d'améliorer le rapport solidité-poids des éléments d'âme et de réduire les coûts.

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