PRELIMINARY STRESS-BEARING REINFORCED BEAM Russian patent published in 2019 - IPC E04C3/294 

FIELD: construction.

SUBSTANCE: invention relates to building structures, namely to beams of floors, coatings, bridge structures and crane structures. Prestressed steel concrete beam includes rolling profiles that form a box girder, inside which reinforcement and concrete are placed. It contains the supporting diaphragm, a hollow tubular element in the lower part of the box girder, inside which there is a tightening, the wall of the box girder is made with perforations.

EFFECT: technical result consists in reducing beam material intensity.

3 cl, 4 dwg