To prevent creep in rails, the steel sleepers are fixed with rails by clips, bolts and four keys.
If the stock rails are B.H. rails, the type of switch generally provided, is straight cut.
Minimum composite sleeper index for wooden sleepers used over bridge girders, is 1455
Minimum composite sleeper index for wooden sleepers used in cross-overs, is 1352
Rails are fixed on steel sleepers by keys in lugs or jaws
Read More : http://weshineacademy.com/tnps...