Chassis

A chassis (US: /ˈtʃæsi/, UK: /ˈʃæsi/; plural chassis /-iz/ from French châssis [ʃɑsi]) is the load-bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis.