Specification for railway turnouts for private users. Medium grade turnouts over which British Railways locomotives do not operate, for axle loads not exceeding 25 tons. Turnouts using bull head rail.
NORMA vydaná dňa 31.12.1974
Designation standards: BS 4521-3.1:1974
Note: NEPLATNÁ
Publication date standards: 31.12.1974
The number of pages: 42
Approximate weight : 126 g (0.28 lbs)
Country: British technical standard
Kategória: Technické normy BS