Jacking pads will not interfere with the replacement of track wheels (Optional). Suitable jacking pads at a height of 300 mm from rail top will be provided on under frames for jacking up the transfer car when changing track wheels.These safety stops will not interfere with the removal of the wheels. The under frame will be fitted with substantial safety stops to prevent the transfer car from falling more than 25 mm in the event of breakage of track wheel, bogie or axle.The Chequered plates will be supported on a frame of beams adequately designed to take the rated load anywhere on the transfer car platform. The Chequered plates will not be considered for strength calculations of load carrying members. Minimum thickness of chequered plates for platforms shall be 6 mm over plain for indoor transfer cars and 8 mm over plain for outdoor transfer cars.All butt welds on structural members subject to tensile stress shall be X-rayed. Transverse fillet welding on load carrying members will be avoided. Bolts used in shear will be fitted into reamed holes.
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