Weld-free gratings for bridge decks with improved primary and se

Details Weld-free gratings for bridge decks with improved primary and se Weld-free gratings for bridge decks with improved primary and se

1996-07-23

1998-04-07

Lisehora, James

Bridges

Deck

Joint

52668, 404 70, E04C 242

Patent

active

057350086

ABSTRACT:
A weldless grating comprises a plurality of longitudinally extending primary load bearing members having an upper portion having an upper edge, a lower portion and a first web located between the upper portion and the lower portion, the primary load bearing member having a plurality of spaced-apart openings in the first web, the openings in each of the primary load bearing members being aligned with the openings in adjacent primary load bearing members, the openings having a top portion and a bottom portion, at least one of the top portion and the bottom portion having a protuberance extending from the first web into the opening, and a plurality of secondary load bearing members having an upper edge and a lower edge and a secondary web between the upper edge and lower edge, the secondary load bearing members provided with secondary slots in the secondary web. The secondary load bearing members are positioned in the aligned openings in the web of the primary load bearing members, the secondary slots in the secondary load bearing member forming a locking engagement with the protuberances in the openings in the primary load bearing members; and means for maintaining the secondary slots in engagement with the protuberances.

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