PRELIMINARY STRESS-BEARING REINFORCED BEAM Russian patent published in 2018 - IPC E04C3/294 

FIELD: construction.

SUBSTANCE: invention relates to building structures, namely to beams of floors, coatings, bridge structures and crane structures, mainly with a span of 12 m. Prestressed steel concrete beam comprises steel I-beam of composite section, concrete filling, longitudinal prestressed rods. It contains supporting diaphragm. Upper belt of I-beam is made in form of hollow tubular element filled with concrete. Lower belt of I-beam is made in of hollow tubular element with plugs, filled with concrete, inside which rods are prestressed. Wall of I-beam is made of variable cross-section with decrease in height on support sections of beam and contains transverse stiffeners made of sheet steel.

EFFECT: technical result consists in reducing beam material intensity.

1 cl, 3 dwg