Definition of "bufferbeam"

The bufferbeam is another factor that must be carefully considered. The buffing and coupling centre is 3ft 5½in above rail level and the beam carries not only buffers and drawgear but a jumble of train connections such as jumpers and pipes.

1961 May, B. A. Haresnape, “Design on the railway: Part Three”, in Trains Illustrated, page 301