underframe

American  

[uhn-der-freym] / ˈʌn dərˌfreɪm /

noun

1. the lower frame on which a vehicular structure rests.

   the underframe of a bus.

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Etymology

Origin of underframe

First recorded in 1850–55; under- + frame

Example Sentences

Those angle cocks had come into contact with the underframe of the third train car, closing the valves and rendering the air brakes ineffective.

From Washington Post • Jan. 13, 2018

He followed them with rock drills, presses giving unheard-of high powers, improved wood distilling and now an underframe for railway cars that is revolutionary.

From Time Magazine Archive

M, is of the internal pole type, and is supported on the underframe of the wagon.

From Scientific American Supplement, No. 1157, March 5, 1898 by Various

The underframe is provided with spring axle boxes, and also with spring buffers and drawbars.

From Scientific American Supplement, No. 1157, March 5, 1898 by Various

For gages of 20 inches and upward the motors can be mounted on springs and attached to the running axles inside of the wagon underframe.

From Scientific American Supplement, No. 1157, March 5, 1898 by Various