WALLS Russian patent published in 2003 - IPC

FIELD: corrugation of sheet materials, manufacture of light-weight rigid carrying constructions such as roofings, curvilinear or cylindrical facing panels. SUBSTANCE: method comprises steps of preliminarily making lengthwise corrugations; reshaping them by means of clamping working tools to separate successive portions whose length values correspond to that of one of lateral surface of respective corrugation; displacing respective portion relative to plane of blank by length value of another lateral surface of corrugation; bending up by predetermined angle portion of blank clamped between working tools before or after its displacement. EFFECT: enhanced rigidity of metallic thin-sheet constructions with corrugated walls. 5 dwg