Light derrick car and traveling gallows are used in constructing bridges of Pennsylvania railroad over Big Creek near Marshall, Ill., consisting of three deck-girder spans of 125 ft. erection procedure is briefly outlined.
Traveling gallows frame used in placing 125-ft. Bridge girders
Eng. News-Rec
Engineering News Record ; 103 , n 10
1929
2 pages
3 Figs.
Article (Journal)
English
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