Railway wagon maintenance and adjustment
The chassis of railway freight cars is a rectangular frame composed of various longitudinal and transverse steel beams, generally consisting of center beams, side beams, sleeper beams, crossbeams, end beams, and floor crossbeams. It supports the vehicle body and is the foundation of the vehicle body. The chassis of the vehicle bears the entire weight of the upper body and load, and transmits the weight to the running gear through the upper and lower center plates.