Standard Track Measurement

GAUGE

Broad Gauge- 1676mm

1. On Straight- -6 to +6mm
2. On curves with a radius of 440 m or more -  -6 to +15mm
3. On curves with a radius less than 440 m  -  up to +20mm

Meter Gauge- 1 m.

Narrow Gauge- 762 mm or 610 mm.

BALLAST

Ballast size- 50 mm.
Ballast Cushion

1. On mainline speed less than 50 Km/h- 300 mm.
2. On mainline speed more than 50 Km/h- 350 mm.
3. On loop line- 250 mm.

SLEEPER

Main Feature of PSC-12/PSC-14 Sleeper

• Length: 2750 mm
• Weight: 267 kg
• Distance between Insert at rail sheet: 148 mm/162 mm
• Service Life: 50-60 years

BRIDGE

1. Gape between Gaurd rail & Running rail- 250+50 or 250-50 mm.
2. Joint sleeper spacing- 100 mm.

CURVE

For 1 degree of curve = 28.57 mm, for 2 degree = 2x28.57=57.14 mm and so on.

1. Sation to sation versine variation for speed below 140 kmph and up to 110 kmph - 10mm  (15mm for speed of 110 kmph) or 25% of average versine on circular curve whichever is more.
2. Sation to station versine variation for speed below 110 kmph - 20mm or 20% of average versine on circular curve whichever is more.
3. Check Rail is required for 8° or above.
4. Clearance of Check Rail - 44 mm.
5. Maximum Cant (SE)-165 mm
6. Maximum Cant Deficiency - 75 mm
7. Maximum Cant Axcess- 75 mm (Note: Principal Chief Engineer can extend up to 100 mm on Rajdhani & Shatabdi route)

Points & Crossing

1. Clearance of check rail - 44-48 mm & 41-45 mm (for fan shape crossing).
2. Through or Opening of Switch is 95-115 mm.
3. Clearance of Heal Divergence- 182.5 mm for 1 in 8.5 & 175 mm for 1 in 12 crossing.
4. Wear of Crossing - 8 mm (In Rajdhani or Shatabdi Route) & 10 (In Other Route).
5. Minimum clearance of wing rail - 41 mm
6. Maximum clearance of wing rail - 45 mm

Level Crossing Parametre

1. LC Gate check rail clearance = 51 to 57 mm
2. Minimum depth of space for wheel flange from rail level = 38 mm
3. The vertical clearance of boom from road surface = 0.85 to 1.0 mm
4. The distance of gate post from the centerline of nearest track = 3 m
5. Road signboard from gatepost = 120 m
6. Speed breaker from gate post = 20 m (within Railway land)
7. Height at center of speed breaker - 12.5 cm
8. Width of speed breaker - 2 m
9. Speed breaker board from speed breaker = 120 m
10. Height gauge post distance from gate post = 15 m
11. Heigh of height gauge = 4.67 m
12. The distance of gate lodge from the centre of nearest track = 6 m
13. Fencing length on UP and DN side = 15 m
14. Minimum length of check rail = 2.0 m more than the width of the gate.
15. Leveled length from gate post = 8.0 m 
16. Gradient of approach road = 1 in 30
17. Straight length from gate post = 9.0 m (min)
18. Distance of whistle board = 600 m
19. Visibility for train = 600 m
20. Visibility for road users = 600 m

Indian Railways Schedule of Dimensions

Drilling of Holes in Rails

1. Ordinary Rails Hole at Fish Plate Joint=32mm (31.75)
2. Adjoining Rail of CMS Crossing=26.5
3. Glued Joints=30 mm
4. Check Rail Hole=27/28mm
5. Hole in Tongue Rail for fixing Stbr=18/20mm
6. Stock Rail Hole for Slide chairs=28mm
7. Fish Bolt Dia=25mm
8. Length of Fish Bolt=144 for 52kg, 147 for 60kg
9. Fishplate Hole Center=83mm

Standard Gap 6mm
Maximum Gap 15mm

10. Length of Fishplate=457.2mm
11. Joggle FP on weld joint Drilling Hole= 28mm
12. Stretcherbar in Switches of T/out Drilling Hole=22.50
13. Drill Hole in Rail for Traction bond hole=17.50.