What is diamond crossing, Civil Engineering

Q. What is Diamond Crossing?

Diamond Crossing is provided when two tracks cross each other either of the same gauge or of different gauges. It consists of two acute crossing ( A and C ) and two abtuse crossing (B & D) a typical diamond crossing consisting of two tracks of the same gauge crossing each other is shown in the fig.

2209_What is Diamond Crossing.png

In the layout ABCD is a rhombus having all the four sides equal the length of various constituents may be calculated as follows -

EB = DF = GN , AB = BC = G cosec α , Diagonal AC = G cosec α / 2 ,

Diagonal BD = G sec α / 2 , Where α = Angle of Crossing. G = Gauge ,N = Number of Crossing.

It would be seen from the layout that the length of the gap at points B & D increases as the angle of crossing decreases. Longer gaps increase the chances of wheels taking two roads on the Indian Railways flattest diamond permitted for BG and MG is 1 in 8 ½.

Along with diamond crossing single or double slips may also be provided to allow the vehicles to pass from one track to another track.

Posted Date: 6/25/2013 8:58:17 AM | Location : United States

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