FIELD: construction.
SUBSTANCE: invention relates specifically to prestressed steel concrete beams of floors or roofs of buildings. The prestressed reinforced concrete beam includes a steel I-beam, embedment concrete. At the ends of the I-beam, “rocker arms” made of a steel spring are installed, with the possibility of rotation, and an additional rib is used to strengthen the support zone. The prestressed reinforcement is insulated from the concrete in a non-metallic sheath. At the ends of the "rocker arm" the ends of the flexible prestressed reinforcing longitudinal rods are fixed by a tension assembly. Rotary "rocker" provides self-regulation of the prestressing of the longitudinal reinforcement.
EFFECT: increase of rigidity of the beam.
1 cl, 3 dwg
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|
RU2675002C1 |
