FIELD: construction engineering. SUBSTANCE: this relates to production of prestressed reinforced concrete structures. Device has body, hydraulic cylinder with rod, and armature grip. Also located in body with resting against rod is cross-member with pair of punches which are parallel to and equidistant from longitudinal axis of cross-member. Grip is made in the form of bush with outer circular groove and is located along cylinder axis in body end. Made in body end are holes for punches and slot for mounting of bush. In addition, bush can be provided with longitudinal slot of width being equal to diameter of bush hole. EFFECT: high efficiency. 1 cl, 5 dwg
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