Double U-shaped combined beam for use in e.g. joist replacement application, has two U-shaped bars inseparably connected with linear surfaces of beam, and central web inseparably connected with upper part and under-belt of beam

摘要

The beam has two U-shaped bars stabilizing a short linear portion between an upper part and an under-belt (2). The U-shaped bars are inseparably connected with linear surfaces of the beam. A central web is inseparably connected with the upper part and the under-belt of the beam. Contact surfaces (5) between U-shaped half shells (3, 4) are inseparably interconnected together, and contact surfaces (6, 7) between the U-shaped bars and upper box caps (1) are inseparably interconnected together.