Abstract: A support member comprises abeam (12) having flanges (16, 18) connected to a central web (14). A first set of wings (20, 22) and a second set of wings (30, 32) are connected to the flange (16). A plurality of angled plates (80, 82, 84, 86) are attached to the flanges (16, 18) of the beam (12). to form receptacles defined between the plates, the web (14) and the flanges, (16, 18) of the beam (12). The receptacle has a relatively large upper opening. The plate (80) has a lower edge that is spaced away from the web (14) so that a bottom opening in the form of a slot between the lower edge of the plate (80) and the web (14) is formed. Alternatively, the lower edge of the plate (80) may come into contact with the web (14) (and be welded thereto), and the receptacle thus formed may have a lower opening formed by having a hole opening in the plate (80) at a lower region of the plate (80).