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Questions and Answers
What is the minimum radius allowed for constructing a new passenger platform on a curve?
What is the minimum radius allowed for constructing a new passenger platform on a curve?
What should be done when altering existing platforms located on curves with radii less than 875m?
What should be done when altering existing platforms located on curves with radii less than 875m?
For the construction of suburban passenger platforms in Mumbai and Pune, what is the acceptable height range to reduce the gap with EMU coaches?
For the construction of suburban passenger platforms in Mumbai and Pune, what is the acceptable height range to reduce the gap with EMU coaches?
What condition must be ensured to permit a platform height greater than 840mm?
What condition must be ensured to permit a platform height greater than 840mm?
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What is required before clearing a new EMU stock for passenger operation on increased height suburban platforms?
What is required before clearing a new EMU stock for passenger operation on increased height suburban platforms?
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Which of the following is NOT mentioned as a factor for permitting a platform height increase?
Which of the following is NOT mentioned as a factor for permitting a platform height increase?
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What is the specified condition for the bottom of the sole bar of EMU coach in relation to platform height?
What is the specified condition for the bottom of the sole bar of EMU coach in relation to platform height?
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What aspect is essential for improving maintenance and monitoring conditions in EMU rake inspections?
What aspect is essential for improving maintenance and monitoring conditions in EMU rake inspections?
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What is the significance of ensuring maintenance conditions for track lines on platform?
What is the significance of ensuring maintenance conditions for track lines on platform?
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What action is necessary if a new design EMU stock is introduced on a suburban section?
What action is necessary if a new design EMU stock is introduced on a suburban section?
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What is the maximum horizontal distance from the centre of the track to the face of a goods platform coping?
What is the maximum horizontal distance from the centre of the track to the face of a goods platform coping?
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What is the minimum height above rail level for high passenger platforms?
What is the minimum height above rail level for high passenger platforms?
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What is the maximum height above rail level for goods platforms (excluding end loading platforms)?
What is the maximum height above rail level for goods platforms (excluding end loading platforms)?
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Which of the following provisions can be made for wider rolling stock at platform walls?
Which of the following provisions can be made for wider rolling stock at platform walls?
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What is the required slope for ramped ends of all platforms, except for end loading platforms?
What is the required slope for ramped ends of all platforms, except for end loading platforms?
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What is the maximum height above rail level for medium-level passenger platforms?
What is the maximum height above rail level for medium-level passenger platforms?
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When measuring platform height for canted track, what reference point is used?
When measuring platform height for canted track, what reference point is used?
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What is the minimum length required for a passenger platform?
What is the minimum length required for a passenger platform?
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What is the minimum distance required from the center of the track to any structure above formation level on a curve with a radius less than 875m?
What is the minimum distance required from the center of the track to any structure above formation level on a curve with a radius less than 875m?
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How high is the clearance required between 305mm and 1065mm above rail level according to the guidelines?
How high is the clearance required between 305mm and 1065mm above rail level according to the guidelines?
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Which of the following clearances is applicable for items (vii) and (viii)?
Which of the following clearances is applicable for items (vii) and (viii)?
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For new works, what is the maximum height requiring a clearance of 2135mm as it decreases to 1980mm?
For new works, what is the maximum height requiring a clearance of 2135mm as it decreases to 1980mm?
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What clearance is required below rail level and up to formation level on curves with a radius less than 875m?
What clearance is required below rail level and up to formation level on curves with a radius less than 875m?
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What is the minimum horizontal distance of any building or structure on a passenger platform from the center line of the track when heights are between platform level and 305mm above platform level?
What is the minimum horizontal distance of any building or structure on a passenger platform from the center line of the track when heights are between platform level and 305mm above platform level?
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What is the minimum horizontal distance required from the center line of the track for structures between 305mm above platform level and 3430mm above rail level?
What is the minimum horizontal distance required from the center line of the track for structures between 305mm above platform level and 3430mm above rail level?
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For existing works, what is the decreasing minimum horizontal distance from the center line of the track for structures between 3430mm and 4115mm above rail level?
For existing works, what is the decreasing minimum horizontal distance from the center line of the track for structures between 3430mm and 4115mm above rail level?
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What is the minimum horizontal distance requirement for new works or alterations to existing works for structures from 3430mm to 4610mm above rail level?
What is the minimum horizontal distance requirement for new works or alterations to existing works for structures from 3430mm to 4610mm above rail level?
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What is the reduced minimum horizontal distance for the return end of platform fencing?
What is the reduced minimum horizontal distance for the return end of platform fencing?
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Which condition allows the Commissioner of Railway Safety to reduce the distance requirements for new foot over bridges on a platform?
Which condition allows the Commissioner of Railway Safety to reduce the distance requirements for new foot over bridges on a platform?
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What is the horizontal distance requirement from platform level to 3430mm above rail level for new foot over bridge cases in Mumbai suburban area?
What is the horizontal distance requirement from platform level to 3430mm above rail level for new foot over bridge cases in Mumbai suburban area?
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What must be designed to avoid lateral bracing up to a height of 2400mm for structures on the platform?
What must be designed to avoid lateral bracing up to a height of 2400mm for structures on the platform?
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For structures between 3430mm and 4610mm above rail level, what is the decreasing distance requirement?
For structures between 3430mm and 4610mm above rail level, what is the decreasing distance requirement?
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What is the minimum height for the contact wire in the Mumbai Suburban area?
What is the minimum height for the contact wire in the Mumbai Suburban area?
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What should be the maximum height of rolling stock allowed under the specified conditions?
What should be the maximum height of rolling stock allowed under the specified conditions?
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Which condition must be met regarding crossovers near Foot Over Bridges (FOB)?
Which condition must be met regarding crossovers near Foot Over Bridges (FOB)?
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What is the minimum horizontal distance from rail level to a structure that is 3355 mm above rail level?
What is the minimum horizontal distance from rail level to a structure that is 3355 mm above rail level?
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Which height range has a horizontal distance requirement of 1600 mm from the center of the track?
Which height range has a horizontal distance requirement of 1600 mm from the center of the track?
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What is the prescribed minimum horizontal distance for structures below rail level up to the formation level on curves with a radius less than 875 m?
What is the prescribed minimum horizontal distance for structures below rail level up to the formation level on curves with a radius less than 875 m?
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What additional study is required to ascertain the feasibility of maintaining the contact wire height at 4800 mm?
What additional study is required to ascertain the feasibility of maintaining the contact wire height at 4800 mm?
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At what height should the horizontal distance of 1370 mm be allowed for works where electric traction is not likely to be introduced?
At what height should the horizontal distance of 1370 mm be allowed for works where electric traction is not likely to be introduced?
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What is the minimum horizontal distance from the center of the track for a structure 4115 mm above rail level?
What is the minimum horizontal distance from the center of the track for a structure 4115 mm above rail level?
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What is the height from which the horizontal distance noted for existing works decreases to 1980 mm?
What is the height from which the horizontal distance noted for existing works decreases to 1980 mm?
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What is the minimum height required for overhead structures when D.C. traction is in use?
What is the minimum height required for overhead structures when D.C. traction is in use?
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Which of the following dimensions applies to a low roof that infringes restrictions but is permissible for certain structures?
Which of the following dimensions applies to a low roof that infringes restrictions but is permissible for certain structures?
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What additional vertical clearance is required under over head structures in electrified sections to accommodate track raising?
What additional vertical clearance is required under over head structures in electrified sections to accommodate track raising?
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When existing primary lines are not likely to be electrified, which dimensions may continue to be used?
When existing primary lines are not likely to be electrified, which dimensions may continue to be used?
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What is the minimum height above rail level for a foot over bridge or signal gantry in relation to the center of the track?
What is the minimum height above rail level for a foot over bridge or signal gantry in relation to the center of the track?
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What is the recommended maximum gradient for new works in station yards?
What is the recommended maximum gradient for new works in station yards?
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For existing works, what is the maximum steepest gradient allowed in station yards?
For existing works, what is the maximum steepest gradient allowed in station yards?
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What should be the maximum horizontal distance from the center of track to the face of the passenger platform coping?
What should be the maximum horizontal distance from the center of track to the face of the passenger platform coping?
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In new line projects, what is the provision for class 'C' stations regarding future conversion?
In new line projects, what is the provision for class 'C' stations regarding future conversion?
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What is the minimum horizontal distance requirement from the center of the track for structures between 305mm and 3430mm above rail level?
What is the minimum horizontal distance requirement from the center of the track for structures between 305mm and 3430mm above rail level?
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What is the required horizontal distance from platform level to structures between 3430mm and 4610mm above rail level?
What is the required horizontal distance from platform level to structures between 3430mm and 4610mm above rail level?
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When constructing a platform coping for wider stock, what is the maximum face distance allowed?
When constructing a platform coping for wider stock, what is the maximum face distance allowed?
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What is the maximum center-to-center distance required for approaches to bridges if the center-to-center distance is less than 5300mm?
What is the maximum center-to-center distance required for approaches to bridges if the center-to-center distance is less than 5300mm?
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What is the maximum allowable width for a foot over bridge (FOB) landing in relation to the platform width?
What is the maximum allowable width for a foot over bridge (FOB) landing in relation to the platform width?
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What is the minimum horizontal distance required from the center line of the track to a building that is not an island platform?
What is the minimum horizontal distance required from the center line of the track to a building that is not an island platform?
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What illumination requirement is mandated for the FOB zone during nighttime?
What illumination requirement is mandated for the FOB zone during nighttime?
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Which of the following conditions is NOT applicable to the construction of structures within 5330 mm of the track?
Which of the following conditions is NOT applicable to the construction of structures within 5330 mm of the track?
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Under what condition can the minimum horizontal distance of 6830 mm be reduced to 5330 mm?
Under what condition can the minimum horizontal distance of 6830 mm be reduced to 5330 mm?
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What is the recommended minimum horizontal distance from the center line of the track for future platform extensions?
What is the recommended minimum horizontal distance from the center line of the track for future platform extensions?
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What is NOT allowed in the FOB zone regarding construction and structures?
What is NOT allowed in the FOB zone regarding construction and structures?
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Which of the following statements about isolated structures on platforms is correct?
Which of the following statements about isolated structures on platforms is correct?
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What height is specified for structures that affect the horizontal distance requirement between the center of the track and any construction?
What height is specified for structures that affect the horizontal distance requirement between the center of the track and any construction?
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What additional consideration is included for structures built over areas where future platforms might extend?
What additional consideration is included for structures built over areas where future platforms might extend?
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What is the consequence of building a passenger platform on a curve with a radius less than 875m?
What is the consequence of building a passenger platform on a curve with a radius less than 875m?
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Which of the following is NOT a necessary action when introducing a new design EMU stock on suburban sections?
Which of the following is NOT a necessary action when introducing a new design EMU stock on suburban sections?
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For suburban passenger platforms, which set of conditions relates to allowing a platform height exceeding 840mm?
For suburban passenger platforms, which set of conditions relates to allowing a platform height exceeding 840mm?
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What monitoring condition is specified for improving track maintenance on platform lines?
What monitoring condition is specified for improving track maintenance on platform lines?
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What is the primary factor impacting the platform height for EMU stocks in fully loaded conditions?
What is the primary factor impacting the platform height for EMU stocks in fully loaded conditions?
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In which situation is the General Manager permitted to approve platform heights higher than 840mm?
In which situation is the General Manager permitted to approve platform heights higher than 840mm?
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Which requirement is mandated for the trial of new EMU stocks on increased height platforms?
Which requirement is mandated for the trial of new EMU stocks on increased height platforms?
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What action is necessary during gauge conversion or doubling works concerning existing curves?
What action is necessary during gauge conversion or doubling works concerning existing curves?
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What is the main focus for improving maintenance practices for EMU rakes during inspections?
What is the main focus for improving maintenance practices for EMU rakes during inspections?
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What height is the bottom of the sole bar of EMU coaches required to be above rail level?
What height is the bottom of the sole bar of EMU coaches required to be above rail level?
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What is the minimum horizontal distance required for structures between 305mm above platform level and 3430mm above rail level from the center line of the track?
What is the minimum horizontal distance required for structures between 305mm above platform level and 3430mm above rail level from the center line of the track?
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For new works or alterations to existing works, what is the horizontal distance from 3430mm above rail level to 4610mm above rail level?
For new works or alterations to existing works, what is the horizontal distance from 3430mm above rail level to 4610mm above rail level?
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What is the reduced minimum horizontal distance for the return end of platform fencing?
What is the reduced minimum horizontal distance for the return end of platform fencing?
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In the Mumbai suburban area, what height allows dimensions to be reduced for constructing new foot over bridges on platforms?
In the Mumbai suburban area, what height allows dimensions to be reduced for constructing new foot over bridges on platforms?
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What design consideration must be made for supporting columns of a foot over bridge deck on a platform?
What design consideration must be made for supporting columns of a foot over bridge deck on a platform?
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What is the horizontal distance requirement for structures that fall between 3430mm and 4115mm above rail level for existing works?
What is the horizontal distance requirement for structures that fall between 3430mm and 4115mm above rail level for existing works?
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What is the reduction allowance granted by the Commissioner of Railway Safety for structures on a platform when applicable?
What is the reduction allowance granted by the Commissioner of Railway Safety for structures on a platform when applicable?
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From where does the minimum horizontal distance of 4115mm begin when considering new foot over bridges?
From where does the minimum horizontal distance of 4115mm begin when considering new foot over bridges?
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What happens to the horizontal distance as structures increase from 3430mm above rail level to 4610mm?
What happens to the horizontal distance as structures increase from 3430mm above rail level to 4610mm?
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What horizontal distance is specified from platform level to 305mm above platform level?
What horizontal distance is specified from platform level to 305mm above platform level?
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Study Notes
Platform Dimensions
-
Minimum and Maximum Distances from Track Centre to Platform Edges:
- Goods Platform Coping: 1670mm to 1680mm
- Any Platform Wall: 1675mm to 1905mm
- New platform walls should aim for maximum dimensions, with coping corbelled out to 1675mm unless wider rolling stock is anticipated.
-
Platform Heights:
- High Passenger Platforms: 760mm to 840mm
- Medium Level Passenger Platform: 455mm
- Goods Platforms (excluding horse and end loading platforms): 1065mm
- Platforms may be flush with rail level.
-
Platform Ends (except end-loading):
- Ramps: 1 in 6 slope, extending 1m from the platform wall face.
- Remaining area: Can be ramped or fenced.
- Platforms Serving Canted Track: Heights measured vertically from the platform face to a plane through the top of both rails.
- End Loading Platforms and Platforms on Sidings for Horse Loading: Maximum height of 1295mm.
- Signal Wires or Supports: Allowed beneath the platform coping.
- Passenger Platform Length: No less than the length of the longest passenger train (excluding the engine) booked to stop at the platform.
- Passenger Platforms on Curves: Minimum radius 875m for new lines.
- Existing Line Platform Alterations: Efforts should be made to ease out curves with radii less than 875m, but condonation of CRS/Board may not be necessary.
-
Mumbai and Pune Suburban Platforms: Height can be 840mm-900mm for EMU stock with bottom of sole bar at least 1039mm above rail level in fully loaded condition. Increase in height requires General Manager approval, contingent on:
- Improved EMU maintenance practices.
- Elevated track maintenance standards.
- Enhanced monitoring and corrective action for track sinkage.
- Running trials for new EMU designs.
Building and Structure Clearance
-
Minimum Distance of Buildings/Structures from Track Centre Line (Passenger Platforms):
- Platform Level to 305mm Above: 5180mm increasing to 5330mm
- 305mm to 3430mm Above Rail Level: 5330mm
- 3430mm to 4115mm Above Rail Level (Existing Works): 5330mm decreasing to 3810mm
- 3430mm to 4610mm Above Rail Level (New Works/Alterations): 5330mm decreasing to 3810mm
- Platform Fencing Return End: Dimensions may be reduced to 2740mm.
- Isolated Structures: Covered under Item 8.
-
Mumbai Suburban Area (Alternative Provisions for Foot Over Bridges):
- Platform Level to 3430mm Above Rail Level: 4115mm
- 3430mm to 4610mm Above Rail Level: 4115mm decreasing to 3810mm
- FOB Deck and Landing Design: Supporting columns with no lateral bracing up to 2400mm from platform level.
- Tunnels, ROBs, and Bridges in Station Yards: Treated as heavy overhead structures, subject to dimensions in Schedule 1, Chapter 1: General.
-
Mumbai Suburban FOB Height: May be reduced to 5750mm subject to the following conditions:
- Minimum contact wire height of 4800mm.
- Feasibility study for contact wire height.
- No crossovers below or within 40m of the FOB.
- No level crossings within 520m of the FOB.
- Maximum rolling stock height restricted to 4420mm.
- Height measured from the higher or super-elevated rail.
Structure Clearance - General
-
Minimum Distance from Track Centre Line to Any Structure:
-
Existing Works:
- Rail Level to 305mm Above: 1675mm
- 305mm to 3355mm Above: 2135mm
- 3355mm to 4115mm Above: 2135mm decreasing to 1980mm
- 4115mm to 6250mm Above: 1600mm
- Below Rail Level to Formation Level (Straight Track and Curves > 875m): 2575mm
- Below Rail Level to Formation Level (Curves <875m): 2725mm
-
New Works or Alterations to Existing Works:
- Rail Level to 305mm Above: 1905mm
- 305mm to 1065mm Above: 1905mm increasing to 2360mm
- 1065mm to 3735mm Above: 2360mm
- 3735mm to 4420mm Above: 2360mm decreasing to 2135mm
- 4420mm to 4610mm Above: 2135mm decreasing to 1980mm
- 4610mm to 6250mm Above: 1600mm
- Below Rail Level to Formation Level (Straight Track and Curves > 875m): 2575mm
- Below Rail Level to Formation Level (Curves <875m): 2725mm
-
Existing Works:
-
Notes:
- Additional clearances may be required on curves (refer to the Appendix).
- On non-main lines where electrification is unlikely, a 1370mm distance may be allowed from 4115mm to 6100mm above rail level.
- Track fixtures like lock bars, point machines, traction bonds, and signal rodding are exempt from the below-rail level clearance requirements.
- For electrification works in existing yards, no structures can be placed between tracks. If unavoidable, the minimum edge of foundation/mast/signal post/structure distance from track centre is 2360mm (straight track and curves > 875m) or 2510mm (curves < 875m).
- The below-rail level clearance does not apply to bridges, tunnels, and ballastless track.
Yard Gradient
-
New Work:
- Recommended gradient: 1 in 1200 (0.083%)
- Maximum gradient: 1 in 400 (0.25%)
-
Existing Works:
- Maximum gradient: 1 in 400 (0.25%)
Platform Design
-
Horizontal Distance:
- Maximum distance from track centre to platform face: 1680mm
- Minimum distance from track centre to platform face: 1670mm
- Platform coping can be set back to 1905mm to accommodate wider stock
-
Curve Radius:
- New lines should have a minimum curve radius of 875m
- Existing lines with curves less than 875m should aim to ease curves
-
Platform Height:
- Mumbai and Pune suburban platforms may be between 840mm-900mm to reduce gaps with EMU coaches
- Platform height above 840mm requires General Manager approval after ensuring track and rolling stock maintenance
Building and Structure Design
-
Horizontal Distance on Passenger Platforms:
- Minimum horizontal distance from track centre to any building/structure:
- From platform level to 305mm above: 5180mm increasing to 5330mm
- From 305mm to 3430mm above rail level: 5330mm
- From 3430mm above rail level to 4115mm (existing works): 5330mm decreasing to 3810mm
- From 3430mm above rail level to 4610mm (new works or alterations): 5330mm decreasing to 3810mm
- Minimum horizontal distance from track centre to any building/structure:
-
Horizontal Distance on Passenger Platforms (Not Island Platform):
- Minimum distance: 6830mm
- Recommended distance: 12130mm
-
Horizontal Distance for Isolated Structures:
- Minimum distance: 5330mm (for existing lines, 5330mm may be allowed to continue)
Overhead Structures
-
Minimum Height of Overhead Structures:
- For a 1600mm width on either side of track centre: 6250mm
-
Overhead Structures with DC Traction:
- Minimum height: 5410mm
-
Overhead Structures on Secondary Lines (No Electric Traction):
- Minimum height: 4875mm
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Description
This quiz covers the essential specifications for platform dimensions, including minimum and maximum distances from the track center to platform edges, as well as height requirements for different types of platforms. It also addresses regulations for platform ends and canted track serving platforms. Test your knowledge on these critical guidelines in railway construction.
