Abstract: An elongated structural member including two preferably identical wooden members permanently joined in spaced relation by a web member having a length equal to that of the wooden members and a thickness preferably not greater than about one-third that of the wooden members. A groove is formed centrally of one side of each of the wooden members along the full length thereof and marginal edge portions of the web, having a thickness substantially equal to the width of the grooves, are securely fastened in the grooves to join the wooden members. An additional member may be secured to the web along its length, with one edge in abutting relation to one of the wooden members and the other edge in spaced relation to the other wooden member to provide a channel for insertion of an edge portion of a panel member which extends between two of the structural members.