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EXTRACTS FROM

SCHEDULE OF DIMENSIONS-1676 mm (5 ft. 6 in.) GAUGE

(Reprint 1973)

(Including correction slip no. 2,4 & 11)

SCHEDULE-II

RECOMMENDED DIMENSIONS

The following are some recommended dimensions which are generally considered good practice the adoption of which will lead to very desirable uniformity on Indian Railways, but they are not to be treated as standards, a departure from which requires sanction. The clearances to fixed structures and distance center to center of tracks prescribed in item 13 of Chapter I, Schedule I for Tunnels & Bridges should also be adopted for all structures, and not only for tunnels and through Bridges at the time of new construction, or additions/alterations to the existing structures. If however adoption of these dimensions would entail heavy expenditure such cases should be individually referred to the Railway Board for a decision.

Under Chapter II~R Station Yards are also included some dimensions which will facilitate future expansion.

CHAPTER I - R- GENERAL

Where it can be done without appreciable increase of cost, it is desirable to make all clearances greater than those prescribed in Schedule I.

  Spacing of Tracks  
1R. Minimum distance center to center of track 4725 mm
     
     

CHAPTER,II-R STATION YARDS

  Spacing of tracks  
1R. Minimum distance center to center of tracks where it is likely that a water column, signal post, over-bridge, standard etc may be required between tracks 4725 mm
  Note –

(a) In large yards, this extra clearance should be allowed at every third track,if space permits.

(b) See Appendix for extra clearance required of curves.

 
  Length of Sidings  
2R . Minimum clear available length of one siding at any station where it is Intended to cross trains :  
  (i) At a non-watering station - 7 per cent longer than the longest train permitted to run on the section,  
  (ii) At a watering station such that when the train engine is standing (and taking water) at the water column the rear of the longest train permitted to run on the section shall be at least 15 meters clear of the fouling mark in rear, and such that when a second assisting engine is standing (and taking water) at the water column the leading engine is clear of the fouling mark at the front.  
3R. Recommended maximum Gradient in Station Yards. 1 in 1200
  Note.-

1.For the purpose of item 3R a station yard may be taken to extend:

(a) On single line to a distance of 50 meters beyond outermost points at either end of the station.

(b) On double line from Home Signal to last stop signal of each line.

2. However in case adoption of this gradient would entail heavy expenditure, an administrative reference should be made to the Board individually in each case before execution of the work for adopting steeper gradient.

 
  Platforms  
4R .(i) Signal wires or supports for signal wires may be allowed underneath the platform coping, see schedule I, chapter I, item 12 Note (b).

(ii) The length of a passenger platform should be not than the length of the longest passenger train excluding the engine, booked to stop at the platform.

 
5R .End loading platforms and platforms on sidings used exclusively for horse loading may be raised to a height of 1295 mm above rail level.  
  Buildings and Structures-  
6R. (i) Minimum horizontal distance of any building or longitudina1 boundary fence from the face the Platform coping of a platform which is not an island platform. 5485 mm
  (ii)Recommended horizontal distance from the face of a platform coping to any building on a passenger platform which is not an island platform. 10210 mm
  Note

(a) Item 6R(ii) allows for setting back the platform to make room for an additional track in future, without infringing item 6R(i).

 
7R. Minimum clearance at heel of switch rail 57 mm
8R. Minimum clearance between toe of open switch and stock rail. 115 mm
     

APPENDIX

EXTRA CLEARANCES REQUIRED ON CURVES

 

Inside of curve

Outside of curve

Degree of Curvature

Up to 840 mm Above rail level(mm)

From 840 mm to 4420 mm above rail level(mm)

At 5410 mm above rail level(mm)

Any height

(mm)

1

-

120

170

-

1.5

20

220

280

-

2

40

310

380

10

3

70

390

480

30

4

90

420

520

40

5

100

420

510

60

6

110

390

470

80

7

140

470

560

90

8

160

540

640

110

9

180

550

650

130

10

180

500

590

140