E - Fixed Constructions – 01 – B
Patent
E - Fixed Constructions
01
B
E01B 2/00 (2006.01) E01B 1/00 (2006.01) E01B 5/08 (2006.01) E01B 9/62 (2006.01) E01B 19/00 (2006.01) E01B 21/00 (2006.01)
Patent
CA 2180652
A precast concrete grade crossing includes a plurality of base members (18) each of which has a central recess formed in the upper surface thereof. A pair of rails (12, 14) are each encased by a rubber boot (48) which extends through the crossing in a single continuous piece. The boot encased members are received in the recess which includes a shoulder (52) along the outer side of each rail (12, 14). The shoulder (52) bears against a lip (50) of the boot (48) which extends upwardly along outer side of the head of the rail (12) to prevent moisture from entering the space between the boot (48) and the rail (12) below the shoulder (52).
Un passage à niveau en béton préfabriqué comprend une pluralité d'éléments de base (18), chacun d'eux présentant une cavité centrale pratiquée au niveau de la surface supérieure. Une paire de rails (12, 14) est encastrée dans une gaine en caoutchouc (48) s'étendant à travers le passage à niveau en une seule pièce continue. Les éléments encastrés dans la gaine sont logés dans la cavité qui comprend un épaulement (52) le long de la face extérieure de chaque rail (12, 14). Cet épaulement (52) appuie contre une lèvre (50) de la gaine (48) qui se prolonge vers le haut le long de la face extérieure du champignon du rail (12) afin d'empêcher l'humidité de pénétrer dans l'espace compris entre la gaine (48) et le rail (12), sous l'épaulement.
Hanson Pipe & Products Northwest Inc.
Mccarthy Tetrault Llp
LandOfFree
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