Basic designs of concrete sleepers, 8ft 6in long, for use with flat bottom rails and cast iron baseplates (E-217)

Reports E.60. E.77 and E.115 dated 5.10.53, 7.8.54. and 16.1.56. give basic designs of prestressed concrete sleepers for use with flat bottom rails. These designs are of three different strengths (now known as G, F and E respectively) and they are intended for use with only a resilient pad between...