Mor Temor
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2.14 Robert G. Marshall Floating Bridge
Robert G. Marshall and Robert K. Hedrick have invented in 1972 new and useful improvements in preassembled pontoon bridges. This invention relates to suspension bridge preassembled abutment towers and anchorage, and more particularly to the concept of applying the principle of a suspension bridge construction to a pontoon type bridge.
The invention is designed to increase the load capacity of a pontoon type bridge as well as to use fewer floating piers for its support thus resulting in greater economy and faster assembly. The floating piers are provided with a superstructure consisting of a pair of parallel A-frames secured to the deck of a catamaran hulled vessel. Main suspension cables, supported on the apices of the A-frames are anchored at opposite shores and hangar cables attached to the main cables and to the roadway deck provide support between the floating piers. The catamaran vessels are moored by cables to the bed of the body of water or by spuds driven into the bed and retractable in the A-frames.
It is therefore a principal object of this invention to provide a suspension means for supporting the roadway deck of a pontoon type bridge.
A further object is to provide a supporting means for the roadway deck of a pontoon type bridge that will reduce the number of floating piers needed for its construction.
A final object is to provide a temporary, semi-permanent or permanent bridge which can be quickly assembled.
These and other object and advantages of the present invention will be fully apparent from the following description when taken in connection with the annexed drawings, in which:
Fig. 29 is a perspective illustrating the construction of one of the floating piers of the invention;
Fig. 30 is a side elevation of a bridge having multiple floating piers for spanning a wide body of water (Robert, 1972);
Fig. 29 Perspective illustrating the construction of one of the floating piers of the invention.
Fig. 30 Side elevation of a bridge having multiple floating piers for spanning a wide body of water.
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