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Three Automatically Erected Folding Spans

by Mark E. Capron, US Naval Civil Engineering Lab, Port, Hueneme, CA, USA,
Arturo M. Calisto, US Naval Civil Engineering Lab, Port, Hueneme, CA, USA,
Donald L. Kingery, US Naval Civil Engineering Lab, Port, Hueneme, CA, USA,



Document Type: Proceeding Paper

Part of: Bridges and Transmission Line Structures

Abstract:

The U. S. Navy has identified three rapidly erected bridges. Each is capable of spanning 400 feet (120 m) with a 70 ton (63 tonne) live load at mid-span. Each will also fold into a 15 multiplied by 15 multiplied by 36 foot (5 multiplied by 5 multiplied by 11 m) package. A hydraulically unfolded bridge, called Snaplock Truss, is best suited as a modular military or emergency construction bridge. A telescoping bridge, called TELETRUSS, is appropriate for longer permanent spans where modular construction is not important. A double scissor-jack bridge, called Scissor Span, is a rapidly erected construction tool with a flexible shape. Each bridge concept is described in sufficient detail for feasibility comparisons.

Subject Headings: Infrastructure construction | Truss bridges | Bridge design | Trusses | Structural analysis | Modular structures | Construction equipment | United States

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