Sequential kinking guardrail terminal system

E - Fixed Constructions – 01 – F

Patent

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Details

E01F 15/04 (2006.01) E01F 15/14 (2006.01)

Patent

CA 2285217

A highway guardrail terminal system (12) having horizontally extending guardrail elements (14) mounted on a plurality of posts (16a-16e). An impact head (50) is positioned over the upstream end of guardrail (12). Kinker beam (51) is attached to an inlet of head (50). Kinking deflector plate (68) is affixed inside head (50). Deflector plate (68) extends transversely across head (50) from the inlet to the outlet and has a multiplicity of discrete, intersecting angular faces (80, 82, 84, 86, 88). As the rail elements (14) impact deflector plate (68), kinks or plastic hinges are created in elements (14). The impact energy is dissipated by the controlled kinking of the guardrail beams (14).

Système (12) terminal pour glissière de sécurité déformable comportant des éléments (14) glissière horizontaux montés sur une pluralité de poteaux (16a-16e). Une tête d'impact (50) est placée par-dessus l'extrémité amont de la glissière (12). Un rail (51) déformable est fixé dans un orifice d'entrée de la tête (50). Une plaque (68) de déflexion déformable est fixée à l'intérieur de la tête (50). La plaque (68) de déflexion traverse la tête (50) dans une direction transversale entre l'entrée et la sortie et présente une multiplicité de faces angulaires discrètes qui se recoupent (80, 82, 84, 86, 88). Lorsque les éléments (14) de glissière heurtent la plaque (68) de déflexion, des plis ou des coudes se forment dans les éléments (14). L'énergie d'impact est dispersée par la déformation contrôlée des éléments (14) de la glissière de sécurité.

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