s are in place.Derrick carsare equipped with air compressors to supper pneumaticriveters.The shoes are laid on the abutments in approx-imately their correct position and corrected when thegirder is placed on them allowing for a change in temp-erature at the rate one inch for a hundred feet for.… … 13 ERECTION OP THRU TRUST BRIDOIS.New r-ork. No traffic. Many small thru truss bridges are designed to beerected as one piece.In this case the truss may be rivetedup complete at the shop or shipped in sections to be as-sembled at the bridge site.when thi3 is done^erection isvery similar to that of…
Bridges · Theses
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