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Q. What is Chamfering of rail?
Chamfering of rail holes has been done for the life of rail hole is increased and chances of the rail hole developing any crack is eliminated.
To operate the equipment chamfering bits are fixed on either side of the hole of the rail with the help of bolt and packing pieces. The torque is set on the torque wrench to a valve of 370 Lbs ft for 52 kg rails. The nut is then tightened progressively till the designed torque is reached and the torque wrench slips. The nut bolt arrangement is then unscrewed and the equipment is back in normal position.
The manufacturer claim that time taken for chamfering the hole is only about 1½ minute.
The Figure 1 below shows a section through a stairway for a garage in a new proposed dwelling. The stairway is 3 meters wide with 300 mm wide treads(7 treads) and 170 mm high riser
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