FLATTENING METHOD OF H-BEAMS ATTACHED TO COLUMN Russian patent published in 2015 - IPC B66C7/00 

FIELD: construction.

SUBSTANCE: for restoration of crane runway beams a hydraulic jack that is extended by means of an extending rack, thus attaching its upper end face to the flange of the jack housing is used. One of the anchor bolts, which attaches the lower beam flange to the plate of the column arm, is removed, and the rest are weakened by the jacking value. A puncheon is inserted into a hole in the lower flange for the anchor bolt, till it is borne against a restraint plate covering the hole in the column arm plate. The plunger of the hydraulic jack is borne against the upper flange of the beam from below; supports of two beams connected to each other are jacked by the design value till the anchor bolt is borne against the arm plate from below. Two beams are moved in a suspended state in a transverse direction by the design value till they are borne against the restraint of horizontal movement. Pads of design thickness are laid under support ribs; beams are lowered with the hydraulic jack onto the pads and attached to the column and to the plate of its arm.

EFFECT: reducing labour costs for flattening by mechanisation of the process.

3 dwg