MANUFACTURING METHOD OF PRE-STRESSED H-BEAM Russian patent published in 2015 - IPC E04C3/10 

FIELD: construction.

SUBSTANCE: manufacturing method of a pre-stressed H-beam provides for a design that consists of a lower flange, a web and an upper flange, which are connected by a weld. In order to produce an H-beam with tension of edges of the web and flanges, which work for compression, without any bending of the product after pre-stress, the following process is performed: the lower flange and the web, which are welded, are bent towards the web; the upper flange is welded to the tension part of the web; then, the lower flange is separated from the structure, which in its turn is bent to the reverse side, and the lower flange is welded to the tension side of the web. Tension in upper and lower flanges and edges of the web is the same; the beam takes up a straight-line position.

EFFECT: improving beam performance.

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