E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
14/13
E04C 3/10 (2006.01) E01D 2/00 (2006.01) E01D 19/12 (2006.01) E04C 3/14 (2006.01)
Patent
CA 1312422
A B S T R A C T This invention relates to a bridge deck comprised of longitudinally positioned timbers having metal plates inserted between the timbers. Trans- versely positioned rods apply compressive forces to the timbers and metal plates. Resulting friction causes bridge deck components to behave as a single unit. The metal plates are inserted between timbers of various sizes and lengths of the stressed deck bridge. Proper transverse stressing of component parts by use of high strength steel rods or tendons allows shear and flexural stresses, caused by applied loads, to be transferred between plates and timbers by friction alone without glue or metal fasteners. De- flections, caused by applied loads, are greatly reduced when properly designed plates are employed. Without plates, the use of stressed timber deck bridges, under today's highway loads, is limited to short spans with large timber dimensions. Such structures are handicapped economically when compared with other types of bridge systems such as prestressed concrete or composite concrete-steel bridges. Properly designed and inserted plates have been shown to greatly improve the structural performance of stressed timber decks.
606965
Mitchell Richard J.
Mozingo Ralph
LandOfFree
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