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BS 4521-3.1:1974
M00000080
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BS 4521-3.1:1974 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
standard by BSI Group, 12/31/1974
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Turnouts from straight track, 4 ft 8 in gauge, nomenclature, materials, design, production, inspection, identification marking, layout, leading and detail dimensions. Appendix gives recommended minimum requirements for partly worn rails.Cross References:
BS 9
BS 24:Part 3A
BS 24:Part 6
BS 47
BS 64
BS 84
BS 729:Part 1
BS 913
BS 916
BS 970:Part 1
BS 970:Part 5
BS 1452
BS 1802