Design of concrete sleeper for flat bottom rail in category 'C' and 'D' lines (E-115)

Report E.60, dated 5.10.53, described a design of pre-stressed concrete sleeper which was intended for use in Category "A" lines. The design of sleeper, which la considerably stronger than the design being manufactured to B.S.986; 1945 Class E, for use with bull head rails, is now undergoing service trials. ...