Ladder stiles and ladders produced therefrom

E - Fixed Constructions – 06 – C

Patent

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Details

E06C 7/08 (2006.01) E06C 7/10 (2006.01)

Patent

CA 2107000

The invention is directed to strong, lightweight, electrically non-conducting ladder stiles (20) and ladders formed therefrom. Each ladder stile (20) comprises a tension (24) and compression portion (22) structurally interconnected by a spacing portion (26). The spacing portion (26) has a cross section which varies over the length of the stile (20) between sections where the entire spacing portion (26) is the full width of the stile (20) and sections where at least part of the spacing portion (26) is less than the full width of the stile (20). The ladders of the invention are formed of two ladder stiles (20) interconnected by rungs.

L'invention concerne des montants d'échelle (20) robustes, légers et non conducteurs électriquement, ainsi que des échelles dans lesquelles sont incorporés lesdits montants. Chaque montant (20) acomprend une partie soumise à tension (24) et une partie soumise à compression (22), reliées par une partie intercalaire (26). La partie intercalaire (26) a une section transversale qui évolue le long du montant (20) entre des zones où la partie intercalaire (26) est entièrement constituée par la largeur totale du montant (20), et des zones où au moins une portion de la partie intercalaire (26) est inférieure à la largeur totale du montant (20). Les échelles de l'invention sont constituées par deux montants d'échelle (20) reliés par des barreaux.

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