Concrete sleeper design and performance service trials with the F26 'broad base' sleeper (TM-CES-117)

By the middle 1960s, the F23 concrete sleeper assembly had become the most common standard for the majority of new track. The structural aspects of the sleeper were based on a design prepared in 1954 and adopted generally for the F10 (BJB) and other contemporary sleepers from 1955 onwards. In...