FIELD: construction.
SUBSTANCE: invention relates to construction and can be used as structural elements of bearing structures of buildings. In H-shaped folded closed profile of two walls and one flange formed of two perforated elements of U-shape, attached to walls by means of tooth closures of longitudinal edges of vertical sections and mutually resting on horizontal sections, perforated elements throughout the horizontal sections are provided with cutouts with toothed edge closure along the entire perimeter of each of said cuts. At that, when width of cuts is 0.2…0.8 of profile width, ratio of its overall dimensions is equal to 1/1.809…1/1.771, and with no cuts, this ratio is equal to 1/1.810.
EFFECT: technical result of the invention is overall stability of H-shaped folded closed profiles, their uniform stability from the plane and in the plane of the bearing structure.
1 cl, 11 dwg, 1 tbl
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