Railways Signalling Slip Siding & Catch Siding
On Indian Railways for all gauges the maximum gradient permitted is 1:400, where as1:1200 is usually allowed within the station yard. No station yard should be steeper than 1:260, except due to geographic conditions. Where such gradient cannot be avoided with in the station yard, condo nation of CRS is to be to be obtained for providing „SLIP SIDING„. Slip siding will prevent vehicles entering block section.
Where gradients are steeper than 1:80 falling towards the station, to prevent vehicles entering station section from block section. This arrangements is know as „CATCH SIDING‟ Catch siding will prevent vehicles entry into block section.
Slip sidings and „Catch sidings‟ points must be interlocked with block instruments and
these sidings should not be used for shunting or stabling purposes.