Railway CANT - Bottom Slope Measuring Device - BY88078Characteristics: Because the main part of the train wheel tread is with 1: 40 slope. In order to promise the top of rail with even force under the load of a conical wheel tread, rail should be tumbling in instead of perpendicular in the straight direction. This tumbling in angle is called as rail bottom slope. Our railway bottom slope measuring device is easy to use both in the daytime and at night. Its an ideal measuring tool for public works and