LOAD BEARING BEAM MADE OF WOOD FOR BUILDING STRUCTURES OF VARIOUS KIND AND BUILDING STRUCTURES REALIZED BY MEANS OF A PLURALITY OF SUCH LOAD BEARING BEAMS MADE OF WOOD

摘要

Load bearing beam made of wood for building structures of various kind, particularly but not exclusively for floors, ceiling and the like, with characteristics of high mechanical strength and anti-fire resistance, higher than those of the beam known from the art. Beam comprising at least a vertical central core (11) with an outline preferably of parallelepiped shape, and at least an upper flange (12) and a lower flange (13), preferably of parallelepiped shape with horizontal extent, fixed laterally by means of adhesives or other suitable fixing means respectively to the upper and lower end portion of said central core (11). The central core (11) is formed by a plurality of sheets of wood of any kind and with the same thickness and/or different thicknesses, and the same shape and length of the same central core, which are put side by side and joined to each other by means of adhesives or other suitable fixing means, so as to form sheets of laminated veneer lumbers. Each one of said upper flanges (12) and lower flanges (13) is formed by a plurality of laminated wood elements of any kind, with the same shape and size of each flange, which are put side by side and joined to each other in the longitudinal direction of the flange by means of adhesives or other suitable fixing means, so as to form laminas with longitudinal extent, of the same length and/or variable lengths. Each one of the upper flanges (12) and lower flanges (13) is formed by at least two respective separated upper half-flanges (12', 12") and lower half-flanges (13', 13"), which are fixed to the two sides of the upper and lower end portion of said central core (11).