Railways – Elevated structure
Patent
1975-09-29
1977-01-11
Spar, Robert J.
Railways
Elevated structure
14 1, 104106, 104118, 104125, E01B 2524, B61B 1204
Patent
active
040021254
ABSTRACT:
Apparatus is provided for supporting load bearing, sharply curved girders, particularly for use in a transportation system. The sharply curved girders are supported only at their ends, even for those of substantial length, so as to reduce the number of vertical supports for the girders. This is achieved by providing a relatively short cross-support for the girder extending from the vertical support through the girder at each end thereof, with that cross-support or console having one end bearing on the vertical support and the other end forming a portion of a pivot bearing positioned on the inside of the curve of the girder. A crossbeam rigidly connected to the vertical support also extends transversely of each girder end and forms the opposite portion of the pivot bearing. Thus, torsional forces tending to twist the outside of the curve of the girder downwardly under load is compensated by the pivot bearing which provides a twisting force in the opposite direction.
REFERENCES:
patent: 3760737 (1973-09-01), Becker et al.
patent: 3842462 (1974-10-01), Bainbridge
patent: 3921240 (1975-11-01), Fyfe
Demag A.G.
Reese Randolph A.
Spar Robert J.
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