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Prestressed lightweight concrete bridge 131 ft long
Prestressed girders of light weight concrete span 130 ft to carry H20-5 16 loading on logging road in Washington; expanded shale, Empire Lite Rock, was used with natural sand to make 115-pfc concrete, producing strength of 4500 psi after steam curing for 15 hr; prestressing was done with 42 strands of CF and I Roebling wire; 18 top strands were pulled down at three central points; beams were cast at Empire Prestress Yard in Portland and moved by rail close to point of placement; cross diaphragms were cast with beams, and transverse rods were used to tie four beams into unit; 3-in. thick deck was cast in place over 5-ft deep beams.
Prestressed lightweight concrete bridge 131 ft long
Prestressed girders of light weight concrete span 130 ft to carry H20-5 16 loading on logging road in Washington; expanded shale, Empire Lite Rock, was used with natural sand to make 115-pfc concrete, producing strength of 4500 psi after steam curing for 15 hr; prestressing was done with 42 strands of CF and I Roebling wire; 18 top strands were pulled down at three central points; beams were cast at Empire Prestress Yard in Portland and moved by rail close to point of placement; cross diaphragms were cast with beams, and transverse rods were used to tie four beams into unit; 3-in. thick deck was cast in place over 5-ft deep beams.
Prestressed lightweight concrete bridge 131 ft long
Civ Eng (NY)
Laszlo, G. (author)
1967
2 pages
Article (Journal)
English
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