| 摘要 |
PCT No. PCT/SE86/00127 Sec. 371 Date Jan. 7, 1987 Sec. 102(e) Date Jan. 7, 1987 PCT Filed Mar. 24, 1986 PCT Pub. No. WO86/05537 PCT Pub. Date Sep. 25, 1986.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. The beam is produced in that the flanges (10, 11) are provided with recessed bores at predetermined locations, washers are pressed into the recesses (27), and the end portions (14, 15) of the web-forming rods are inserted in their bores through the opening of the washers. |
