BS 4521-4:1975

Withdrawn

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

Available format(s)

Hardcopy , PDF

Withdrawn date

31-08-2015

Language(s)

English

Published date

30-04-1975

Publisher

British Standards Institution

Co-operating organizations
Foreword
Specification
1 Scope
2 Definitions
3 Inspection
4 Identification marking
5 General requirements
6 Nomenclature
7 Materials
8 Dimensions
Tables
1 Nomenclature for components
2 Materials for components
3 Leading dimensions of heel switch turnouts with rail
    crossings in Figs. 1 and 11
4 Leading dimensions of spring switch turnouts with
    rail crossings in Figs. 2, 12 and 13
5 Leading dimensions of heel switch turnouts with cast
    manganese crossings in Figs. 3 and 14
6 Leading dimensions of spring switch turnouts with
    cast manganese crossing in Figs. 4 and 15
Figures
1 Layout diagram for heel switch turnouts with rail
    crossings
2 Layout diagram for spring switch turnouts with rail
    crossings
3 Layout diagram for heel switch turnouts with cast
    manganese crossings
4 Layout diagram for spring switch turnouts with cast
    manganese crossings
5 Heel switches nomenclature
6 Spring switches nomenclature
7 Rail crossing and check rails nomenclature
8 Cast manganese crossing and check rail nomenclature
9 Location and marking of rolled steel supports (item
    545) for heel switch turnouts
10 Location and marking of rolled steel supports (item
    545) for spring switch turnouts
11 Leading dimensions of heel switch turnouts with rail
    crossings 1 in 4 and 1/2, 1 in 5, 1 in 5 and 1/2,
    1 in 6, 1 in 6 and 1/2, 1 in 7, 1 in 7 and 1/2 and
    1 in 8
12 Leading dimensions of spring switch turnouts with
    rail crossings 1 in 4 and 1/2 and 1 in 5
13 Leading dimensions of spring switch turnouts with
    rail crossings 1 in 5 and 1/2 , 1 in 6, 1 in 6 and
    1/2, 1 in 7, 1 in 7 and 1/2 and 1 in 8
14 Leading dimensions of heel switch turnouts with cast
    manganese crossings 1 in 4 and 1/2, 1 in 5, 1 in 5
    and 1/2, 1 in 6, 1 in 6 and 1/2, 1 in 7, 1 in 7 and
    1/2 and 1 in 8
15 Leading dimensions of spring switch turnouts with
    cast manganese crossings 1 in 4 and 1/2, 1 in 5, 1
    in 5 and 1/2, 1 in 6, 1 in 6 and 1/2, 1 in 7, 1 in
    7 and 1/2 and 1 in 8
16 Heel switches (item 650) for turnouts 1 in 4 and
    1/2, 1 in 5 and 1 in 5 and 1/2
17 12 ft heel switches (item 654) for turnouts 1 in 6,
    1 in 6 and 1/2, 1 in 7, 1 in 7 and 12 and 1 in 8
18 22 ft 6 in spring switches (item 660) for turnouts
    1 in 4 and 1/2, 1 in 5, 1 in 5 and 1/2, 1 in 6, 1 in
    6 and 1/2, 1 in 7, 1 in 7 and 1/2 and 1 in 8
19 Rail crossings and check rails for heel switch
    turnouts 1 in 4 and 1/2, 1 in 5, 1 in 5 and 1/2, 1
    in 6, 1 in 6 and 1/2, 1 in 7, 1 in 7 and 1/2 and 1
    in 8
20 Rail crossings and check rails for spring switch
    turnouts 1 in 4 and 1/2 and 1 in 5
21 Cast manganese crossings for heel and spring switch
    turnouts 1 in 4 and 1/2, 1 in 5, 1 in 5 and 1/2, 1
    in 6, 1 in 6 and 1/2, 1 in 7, 1 in 7 and 1/2 and 1
    in 8
22 Rail joint (fishplated) (item 107), fishplate (item
    116), fishbolt, nut and washer (item 182)
23 Special fishplate (item 678) for manganese 1 in 7
    and 1/2 and 1 in 8 crossings
24 Rolled steel support (item 545)
25 Steel sleeper (item 563)
26 Spring clip (item 546) for rolled steel support and
    steel sleeper
27 Switch baseplates
28 Stretcher bars (items 132 and 133)
29 Switch, crossing and check blocks
30 Switch and crossing bolts (item 647)

Turnouts from straight 4 ft 8½ in gauge track made from rails dimensionally in accordance with BS 11, section 110A or 113A, in wear resistant steel quality or of cast austenitic manganese steel to BS 1457.

Committee	RAE/2
DevelopmentNote	Supersedes 73/33939 DC. (08/2005) Reviewed and confirmed by BSI, March 2010. (02/2010)
DocumentType	Standard
Pages	50
PublisherName	British Standards Institution
Status	Withdrawn

BS 500:1956	Specification for steel railway sleepers for flat bottom railway rails
BS 970-5:1972	Specification for wrought steels in the form of blooms, billets, bars and forgings Carbon and alloy spring steels for the manufacture of hot formed springs
BS 1802:1951	Specification for steel spring washers for general engineering and automobile purposes
BS 64:1946	Specification for steel fishbolts and nuts for railway rails
BS 24-6(1957) : LATEST	RAILWAY ROLLING STOCK MATERIAL - STEEL SLABS, PLATES, SECTIONS, BARS AND RIVETS FOR LOCOMOTIVE BOILERS, LOCOMOTIVES, CARRIAGES AND WAGONS
BS 84:1956	Specification for parallel screw threads of Whitworth form
BS 47:1959	Specification for steel fishplates for bullhead and flat bottom railway rails
BS 11:1985	Specification for railway rails
BS 1457(1957) : LATEST	AUSTENITIC MANGANESE STEEL CASTINGS
BS 24-3A:1959	Railway rolling stock material Specification for laminated springs and spring steels