What is called orbital angle?
Has the best bending performance of I-shaped section by section shape of rail, a rail, rail waist and rail base is composed of three parts (Figure). In order to make the rail better withstand the force from various aspects, and ensure the necessary strength conditions, the rail should have enough height, the head and the bottom should have enough area and height, the waist and the bottom should not be too thin.
The rail must provide a continuous, smooth, and least resistant rolling surface for the wheel. In electrified railway or automatic block section, rail can also be used as track circuit. The rail can be divided into three kinds: crane rail (crane track), heavy rail and light rail.
It is a major component of a railway track. Its function is to guide the wheel of the rolling stock, to bear the great pressure of the wheel and to deliver it to the sleeper.
