Guard rail (rail)


In rail transport, guard rails or check rails are rails used in the construction of the track. placed parallel to regular running rail, and keep the wheels of rolling stock in alignment in case of derailment. They are generally used along areas of restricted clearance, such as a bridge, trestle, tunnel, or level crossing. They also helps to minimize damage to the structure and allows easier post-accident cleanup.

History

Although guard rails in some form have been used as long as there have been trains, the precursor of the guard rails we have today was detailed in, filed in 1893 by Gorham B. Ames, based in Laconia, New Hampshire, USA.

Sharp curves

On sharp curves, guard rails may be placed inside the inner rail, where they engage the back of the flange of the wheel on that side.