Concrete sleeper development loading tests on F23B F26 sleepers (TN-TS-3)

1.1 The class F non-baseplated sleeper design originated in 1954 and until recently, the dimensions of the seat and centre sections, and the prestressing details have remained virtually unaltered. Static and Dynamic loading tests were carried out on this design in 1957/8 following which the class F sleeper with 26...