Abstract: The invention relates to a beam made of metal intended to be included as a construction element in a coachwork body for buses, trams and similar vehicles in order to be connected, in the coachwork body, to other profiled elements (16, 26, 56) which extend at right angles to said beam (1, 2). What is characteristic of the beam is that it has in profile a closed cavity (3, 43, 83) in one corner of the profile, that at least four legs (11-14, 51-54) extend out in pairs in different directions from the closed cavity, and that the legs in each pair are mutually parallel. The invention also relates to the coachwork in which the beam is included as a part.