BS 4521-1.2:1971
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Specification for railway turnouts for private users. Turnouts over which British Railways locomotives operate Turnouts using flat bottom rail
Hardcopy , PDF
31-08-2015
English
12-05-1971
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Co-operating organizations
Foreword
Specification
1 Scope
2 Definitions
3 Inspection
4 Identification marking
5 Design and production
6 Nomenclature
7 Materials
8 Dimensions
Appendix
A Partly worn rail
Tables
1 Nomenclature for components
2 Materials for components
3 Leading dimensions of turnouts in Figs. 1, 2 and 3
4 Leading dimensions of turnouts in Fig. 5
Figures
1 Layout diagram for turnouts (1 in 7 and 1/2 L.H.
turnout shown)
2 Types of turnout, 1 in 7 and 1/2 and 1 in 8
3 Types of turnout, 1 in 9, 1 in 10, 1 in 11 and 1 in
12
4 Switches, crossing and check rail (for L.H. turnout)
5 Setting-out details for types B and C switches
6 Rail joint (fishplated) (item No. 107) fishplate
(item No. 116) fishplate nut and washer (item No.
182)
7 Coach screw, fang bolt, ferrule (items 38, 39)
8 Universal (main and auxiliary) washer (item 172),
spring clip (item180), tee bolt (item 181)
9 'ST' Baseplate (item 120)
10 'L' Baseplate (item 123)
11 Types B and C straight-cut switches (items 143, 148)
12 Switch baseplates and blocks (items 121, 122, 129)
13 Switch fittings (items 135, 174)
14 Stretcher bars (items 132, 133) and soleplate (item
170)
15 Crossing 1 in 7 and 1/2, 1 in 8, 1 in 9, 1 in 10
(items 144, 145, 146, 147)
16 Crossing 1 in 11, 1 in 12 (items 149, 150)
17 Check rails, baseplate and block (items 110, 125,
131)
18 Crossing baseplates (item 126)
19 Crossing blocks (item 130)
20 Switch and crossing bolts (item 141)
Turnouts from straight track, 4 ft 8½ in gauge, nomenclature, materials, design, production, inspection, identification marking, layout, leading and detail dimensions. Enlarged drawings available upon request.
| Committee |
RAE/2
|
| DevelopmentNote |
Reviewed and confirmed by BSI, March 2010. (02/2010)
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
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