railway points and crossing

Slide 1

Points, Crossings and Yards of RailwaysPrepared By:

K.R.THANKI (BE Civil)LECTURER CIVIL ENGINEERING DEPARTMENTGOVERNMENT POLY TECHNIC ,JUNAGADH,GUJARAT-INDIA. 8/5/20141Points and Crossings:The arrangements by which different routes, diverging from the first track, are connected to faciliate the diversion of trains from one track to another track without any obstruction are known as points and crossings.8/5/20142Points and Crossings:K.R.THANKI (BE Civil) 8/5/20143Turn out:A complete set of points and crossings provides for diverting the trains from a main track to a branch track is known as turn out.

K.R.THANKI (BE Civil) 8/5/20144Turn out:Right Hand Turn out:

Animated diagram of a right-hand railroad switch, rail track A divides into two track B (the straight track) and track C (the diverging track)K.R.THANKI (BE Civil) 8/5/20145Turn out:

Right Hand Turn out:

K.R.THANKI (BE Civil) 8/5/20146Turn out:Left Hand Turn out:

K.R.THANKI (BE Civil) 8/5/20147Turn out:Component parts and Functions :

1)A pair of Points (Switches):A switch, turnout or [set of] points is a mechanical installation enabling railway trains to be guided from one track to another.

K.R.THANKI (BE Civil) 8/5/20148Turn out:

SwitchesK.R.THANKI (BE Civil) 8/5/20149Turn out:Component parts and Functions :

2)A pair of Stock rails:Stock rails along with their respective tongue rails from a pair of switches or points.

Function of stock rails is to facilitate smooth working of tongue rails.

K.R.THANKI (BE Civil) 8/5/201410Turn out:

Stock railsK.R.THANKI (BE Civil) 8/5/201411Turn out:Component parts and Functions :

3)V Crossing:The function of V crossing is to provide gaps between the rails tobe crossed so that wheel flanges can pass through the gaps without any obstruction.K.R.THANKI (BE Civil) 8/5/201412Turn out:V Crossing


4)Two check rails:Function of these rails is to check the tendency of wheels to climb over the crossing.

K.R.THANKI (BE Civil) 8/5/201414Turn out:Two check rails


5)Four lead rails:Function of these rails is to Lead the track from heel of switches to the toe of crossing.

K.R.THANKI (BE Civil) 8/5/201416Turn out:lead rails


6)Switch tie plate:Function of switch tie plate is to maintain gauge distance at front of switch.


7)Stud(Stop):A Bent plate which is jointed to stock rail is called stop.

Function of stop is to maintain the alignment.


8)Side Chairs:

Function of Side chair is to support the tongue rails throughout their length.


9)Stretcher bar:Function of Stretcher bar is to connects toes of both the tongue rails so that each tongue rail moves through same distance.


10)Rods,Cranks,Lever:Function of Rods,Cranks,Lever is to operate the points.

K.R.THANKI (BE Civil) 8/5/201422Turn out:Rods,Cranks,Lever


11)Locking System:Function of Locking System is to Maintain timing between signal and tong rails.

K.R.THANKI (BE Civil) 8/5/201424Turn out:Locking System

K.R.THANKI (BE Civil) 8/5/201425Crossings:Crossing:The arrangements by which different routes, are connected without any obstructions is called crossings.

K.R.THANKI (BE Civil) 8/5/201426Crossings:K.R.THANKI (BE Civil) 8/5/201427Crossings:According to AngleK.R.THANKI (BE Civil) 8/5/201428Crossings:According to Diversion

K.R.THANKI (BE Civil) 8/5/201429Crossings:Acute angleWhen angle of crossing rails become acute angle then this crossing is called Acute crossing or V crossing or Frog.

According to AngleK.R.THANKI (BE Civil) 8/5/201430Crossings:

V crossingK.R.THANKI (BE Civil) 8/5/201431Crossings:V crossing

K.R.THANKI (BE Civil) 8/5/201432Crossings:Obtuse AngleWhen angle of crossing rails become Obtuse angle then this crossing is called Obtuse crossing.

According to AngleK.R.THANKI (BE Civil) 8/5/201433Crossings:Obtuse crossing

K.R.THANKI (BE Civil) 8/5/201434Crossings:Right angle or SquareWhen angle of crossing rails become Right angle then this crossing is called Right angle crossing or Square crossing.

According to AngleK.R.THANKI (BE Civil) 8/5/201435Crossings:Right angle crossing

K.R.THANKI (BE Civil) 8/5/201436Crossings:Spring Crossing:In this crossing wing rail is strongly connected to V part by helical spring so thats why this crosssing is called spring crossing.These crossings used in USA but not in INDIA.

According to Diversion

K.R.THANKI (BE Civil) 8/5/201437Crossings:Spring Crossing

K.R.THANKI (BE Civil) 8/5/201438Crossings:Crossover CrossingFunction of this crossing is to connect two parallel or diverging tracks.According to Diversion

K.R.THANKI (BE Civil) 8/5/201439Crossings:CrossoverCrossing

K.R.THANKI (BE Civil) 8/5/201440Crossings:Scissors Crossing(Double cross):This type of crossing consists 4 pair of switch6 Acute crossings2 Obtuse crossingscheck railsAnd this type is use at goods yard.According to Diversion

K.R.THANKI (BE Civil) 8/5/201441Crossings:

Double crossK.R.THANKI (BE Civil) 8/5/201442Crossings:Diamond CrossingWhen two tracks crosses each other at less than 90 angle then it forms diamond shape so it is called Diamond Crossing


K.R.THANKI (BE Civil) 8/5/201443Crossings:Diamond Crossing

K.R.THANKI (BE Civil) 8/5/201444Crossings:Diamond Crossing

K.R.THANKI (BE Civil) 8/5/201445Crossings:Gathering Lines:When there is more than two track divert from one line then it is called Gathering lines.


K.R.THANKI (BE Civil) 8/5/201446Crossings:Gathering Lines

K.R.THANKI (BE Civil) 8/5/201447Crossings:Gathering Lines

K.R.THANKI (BE Civil) 8/5/201448Ash pit: Functions of Ash pit :

To collect ash which are produced from steam engine.Depth of ash pit varies from 0.76m to1.20m and constructed from concrete.

K.R.THANKI (BE Civil) 8/5/201449Ash pitAsh pit:

K.R.THANKI (BE Civil) 8/5/201450Turn Table: Function of Turn Table:To Turn the engine.

K.R.THANKI (BE Civil) 8/5/201451Turn TableTurn Table:

K.R.THANKI (BE Civil) 8/5/201452Turn TableTurn Table:

K.R.THANKI (BE Civil) 8/5/201453K.R.THANKI (BE Civil)

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railway points and crossing

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