Abstract: A beam having flanges (10, 11) of wood and a web interconnecting said flanges and consisting of metal rods (13) inclined relative to each other in the plane of the web like the bars in a trapezoidal curve and having end portions (14 and 15, respectively) bent in the same plane and at the same angle but in opposite directions and fixed in recessed bores (26) in the flanges (10, 11). Between the central portions and the end portions (14, 15) of the metal rods, washers (28) are accommodated in the recesses with close fit. The end portions (14, 15) are fixed either in blind bores (26) by engaging the wall of the bore, or in throughbores by means of a nut or the like engaging the end portion and abutting against the bottom of a recess of the end of the bore remote from the web. Preferably, the end portions (14, 15) are glued in their bores and the washers in their recesses.