Basic design of concrete sleeper, of class E strength, for use with flat bottom rails and rolled steel baseplates (E-221)

Basic designs of concrete sleepers of strengths G, F and E are given in Reports E.60 (dated 5.10.53.). E.77 (dated 7.8.54.) and E.115 (dated 16.1.56.) respectively. These designs ere for sleepers 8' 6" long for use with flat bottom rails without baseplates and they are identical in shape and...