Sizes of Ballast

Previously, 50-mm (2") ballasts were specified for flat bottom sleepers such as concrete and wooden sleepers and 40-mm (1.5") ballasts were specified for metal sleepers such as CST-9 and trough sleepers. Now, to ensure uniformity, 50-mm (2") ballasts have been adopted universally for all type of sleepers.

As far as points and crossings are concerned, these are subjected to heavy blows of moving loads and are maintained to a higher degree of precision. A small sized, 25-mm (1") ballast is, therefore, preferable because of its fineness for slight adjustments, better compaction, and increased frictional area of the ballast.

Types of Ballast | RAILWAY ENGINEERING - Contents | Requirements of a Good Ballast