Beam used for reinforcing concrete constructions, especially buildings, comprises upper and lower steel plates joined by spacer parts

摘要

The beam comprises an upper steel plate (2) and a lower steel plate (3) joined together by spacer parts (4) extending in the beam length direction. The spacer parts are configured so that alternate parts slope up and down in the beam length direction. The spacer parts are integrally connected to an upper bar and a lower bar for securing to the length edges of the upper and lower plates respectively. An independent claim is also included for a building containing this beam, in which the space between the upper and lower steel plates is filled with a fire repellent material, especially concrete.