Specification for railway turnouts for private users. Heavy grade turnouts over which British Railways locomotives do not operate, for axle loads which may exceed 25 tons, using flat bottom rails.
NORMA vydaná dňa 30.4.1975
Designation standards: BS 4521-4:1975
Note: NEPLATNÁ
Publication date standards: 30.4.1975
The number of pages: 50
Approximate weight : 150 g (0.33 lbs)
Country: British technical standard
Kategória: Technické normy BS