Abstract: The present invention relates to building elements (A) for building of framings of joists or walls. Each building element consists of trapezoid thin sheet here called profile plate (1) completed by wooden bars (2), see FIG. Ia. Alternatively the wooden bars (2) may be replaced by any other corresponding material. In this application the wooden bars (2) or when these have been replaced for the purpose by any other material are called connectors (D). In FIGS. Ib, Ic, 2b, 2c and 4b, 4c the connectors (D) consist of metal bars (2?) respectively metal plates (2?) in stead of wooden bars (2). The object of the building elements (A) is to form support for fastening of layer materials (3) according to FIG. 5b, alternatively bars (4) according to FIG. 5c, alternatively boards (5) according to FIG. 5a or in combination of these (3, 4, 5) e g according to FIG. 5d in order to form a frame for load support perpendicular to the longitudinal direction of the profile plates (1), see FIGS.