Is now in-stalling several thousand substitute ties in main tracks on the eastern and central regions; design of tie which is to carry locomotive wheel load of 127,200 lb. (including impact allowance).
Pennsylvania starts extensive tests of concrete ties
Ry. Eng. Maintenance
Railway Engineering and Maintenance ; 23 , n 3
1927
3 pages
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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Concrete ties on the Pennsylvania railroad
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