Concrete sleepers. A proposal for a slightly cheaper, yet possibly slightly improved design (TM-TS-085)

The basic design of prestressed concrete sleeper, which subsequently became known as the Class F design, was described in Research Dept. Report No. E77, dated August 1954. It thus dates back 24 years. Its basic festure were:- Generally to BS.986 (1945) but of greater depth at the seat...