FIELD: technological processes, metal processing.
SUBSTANCE: invention concerns rolling-mill production, particularly cold-formed section bars. Roll-formed section bar is shaped as channel or angle of two cold-formed stripe bars and features shelves and bent areas. Shelf edges carry "locks" formed by outer stripe edges bent inwards by 180°.
EFFECT: extended usability of roll-formed sections at lower cost.
4 cl, 1 dwg, 2 ex
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