COMPS
Computer Studies IRSOD_ACS_10.pdf

Horizontal distance from centre of track a from 00 mm

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Horizontal Distance From Centre Of Track (a) From 0.0 mm to 305 mm 1905 mm (b) From 305 mm to 1065 mm 1905 mm increasing to 2360 mm (c) From 1065 mm to 3355 mm 2360 mm (d) From 3355 mm to 4420 mm 2360 mm decreasing to 2135 mm (e) From 4420 mm to 5870 mm 2135 mm decreasing to 915 mm [There is no change in this Para w.r.t. the existing provisions of IRSOD 2004] Note : (i) Where electric traction is not likely to be used, over-head bracing of bridges may be 5030mm above rail level for a distance of 1370mm on either side of the centre of track. (ii) In case of existing structures, a special clearance study shall be made which will be accepted by Electrical Inspector of the Railways, as indicated in Appendix–A to Chapter V-A before electric traction is introduced. (iii) See Appendix for extra clearances required on curves. (iv) Where D.C. traction is in use, Para 13(ii)(e) above shall be as under : From 4420 mm to 5410 mm 2135 mm decreasing to 915 mm (v) Tunnels, through girder and semi through girder bridges outside station yards should be treated as heavy overhead structures such as ROB for electrification works and the same dimensions as mentioned in note (c) at Para 10 above shall be applicable and OHE arrangement shall be as per RDSO Drawings. IV. Amendment To Para-10 & 11 Of Chapter-II : Station Yards {At Page – 14 Of IRSOD 2004} In Schedule-I of IRSOD, Revised 2004 10. Height of Over Head Structures Minimum height above rail level for a width of 1600mm on either side of centre of track, of a signal gantry or a foot over bridge in a passenger station : 6250 mm Note : (i) Where D.C. traction is in use or is likely to be used, this minimum height shall be 5410mm. (ii) On secondary lines, where electric traction is not likely to be introduced, this minimum height shall be 4875mm. This also applies to overhead piping arrangements parallel to track wherever provided, which shall necessarily be changed over to the ground hydrants, when the section is electrified. (iii) However, for existing overhead structures, dimensions given in Note (c) of Para 10 of Chapter-I, Schedule-I : General shall be applicable. (iv) Tunnel, through girder bridge and semi-through girder bridge in station yards shall be treated as heavy overhead structures, such as ROB for electrification works and the same dimensions as mentioned in Note (c) of Para 10 of Schedule-I, Chapter – I : General shall be applicable.
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Addendum & Corrigendum Slip (ACS) No. 10 To Indian Railways Schedule Of Dimensions (B.G.) 2004 Railway Board’s letter no. 2011/CEDO/SD/IRSOD/Elect./02, Dated 08.11.12 Page 5 of 9 11. Minimum horizontal distance from centre of track to any structure : (A) For Existing Works : (i) From rail level to 305mm above rail level 1675mm (ii) From 305mm to 3355mm above rail level 2135mm (iii) From 3355mm to 4115mm above rail level 2135mm decreasing to 1980mm (iv) From 4115mm to 6250mm above rail level 1600mm (v) Below the rail level and upto formation level of the track on straight and curves up to radius of 875m 2575mm (vi) Below the rail level and upto the formation level of the track on curves with radius less than 875m 2725mm Note : (a) See Appendix for extra clearances required on curves (b) On lines other than main lines or existing main lines where electric traction is not likely to be introduced, the horizontal distance of 1375mm from 4115mm to 6100mm above rail level may be allowed to continue.
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  • Fall '18
  • William
  • Rail transport, Light Rail, contact wire, Railway Board, IRSOD

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