Glossary Results for Word "Sleeper (1)"
|Sleeper (1)||Sleepers have two functions: holding the rails at the correct distance apart (Gauge) and transferring the pressures of passing trains from the rails to the ballast. Usually made of pressure treated hard wood, but softwood is also used and more recently pre-stressed concrete. LNWR experimented with pressed steel sleepers but did not adopt them. Often sleeper density is increased on curved track, where the lateral forces are higher.|