Layout of Turnout
To lay out a turnout in the field, the values of offsets from the gauge face of the straight track to the gauge face of the turnout may be adopted from Table 14.6.
Table 14.6 Laying turnouts in the field*
Distance from heel |
Offset f 1 in 8.5 4725-mm straight (ST) switch |
rom gauge f 1 in 12 6400-mm ST switch |
ace of straigh 1 in 12 7730-mm curved switch |
it track to g 1 in 8.5 4115-m ST switch |
auge face of 1 in 12 5485-mm ST switch |
turnout 1 in 12 6700-mm curved switch |
3000 |
- |
- |
- |
241 |
- |
- |
4500 |
- |
- |
- |
330 |
- |
- |
6000 |
382 |
293 |
322 |
437 |
313 |
362 |
7500 |
469 |
365 |
381 |
564 |
386 |
445 |
9000 |
565 |
403 |
445 |
709 |
468 |
537 |
10,500 |
672 |
466 |
515 |
- |
559 |
638 |
12,000 |
790 |
512 |
589 |
- |
659 |
747 |
13,500 |
917 |
606 |
668 |
- |
769 |
- |
15,000 |
1055 |
685 |
752 |
- |
- |
- |
16,500 |
1202 |
767 |
841 |
- |
- |
- |
(contd)
Distance |
Offset from gauge face of straight track to gauge face of turnout |
|||||
from heel |
1 in 8.5 4725-mm ST switch |
1 in 12 6400-mm ST switch |
1 in 12 7730-mm curved switch |
1 in 8.5 4115-m ST switch |
1 in 12 5485-mm ST switch |
1 in 12 6700-mm curved switch |
18,000 |
- |
856 |
935 |
- |
- |
- |
19,500 |
- |
950 |
1033 |
- |
- |
- |
21,000 |
- |
1047 |
1137 |
- |
- |
- |
22,500 |
- |
1151 |
1246 |
- |
- |
- |
24,000 |
- |
1260 |
1359 |
- |
- |
- |
Total number |
51 |
70 |
70 |
37 |
47 |
47 |
of sleepers |
||||||
Switch angle |
1°34'27" |
1°8'0'' |
0°27'35'' |
1°35'30'' |
1°9'38'' |
0°24'27'' |
Crossing |
6°42'35" |
4°45'49'' |
4°45'49'' |
6°42'49'' |
4°45'49'' |
4°45'49'' |
angle |
||||||
Drg. no. |
TA |
TA |
TA |
TA |
TA |
TA |
|
20,104 and 20,804 |
5268(M) and 20,801 |
20,171 and 21,831 |
20,171 and 21,004 |
20,401 and 20,001 |
20,484 |
* All dimensions are in millimetres.
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