Sleeper Density in Railways
Number of sleepers provided for one rail length of track is called sleeper density. If “N” is the length of one rail in meters,
Sleeper Density = N+ X , (X –> 3 to 6)
For a Broad Gauge track, total number of sleepers required for 1km length of railway track if sleeper density = N+5
Length of one rail = 12.8m =13m
Sleeper Density = N+5 = 13+ 5 = 18
Total number of sleepers required for 1km length = (18/12.8)x1000 = 1406 sleepers.