Specification provides for ties for standard 4-ft 8 1/2-in. gage railway track over which speed is limited to 20 mph of four types as may be specified by purchaser: method of manufacture; performance test; method of making works cube tests of concrete. (See also Brit Standards Instn -- Brit Standard 986 -- 1941 11 p)
Concrete railway sleepers
Concrete Constr Eng
Concrete and Constructional Engineering ; 36 , n 11
1941
Aufsatz (Zeitschrift)
Englisch
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