Track construction without ties, but with pairs of reinforced-concrete blocks connected by tiebars being tried on practicable scale in Italy; rectangular blocks are laid lengthwise of rails and only short distance apart, so that design approximates longitudinal support on ballast.
Concrete blocks supplant ties in experimental track
Eng. News-Rec
Engineering News-Record ; 106 , n 13 ; p 514
1931
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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