HIGH RIGIDITY BENT SECTION Russian patent published in 2008 - IPC B21D5/06 

FIELD: plastic working of metals, namely shaping metallic sheets for lining walls and ceilings.

SUBSTANCE: section includes lengthwise periodic trapezoidal cross- section corrugations arranged by two rows along width of section and mutually spaced by flat inter-corrugation portions of predetermined size and closed semicircular cross corrugations. Each corrugation passes through mean parts of two lengthwise corrugations normally relative to their axes. Height of all corrugations is the same; width of cross corrugation consists of 0.75 - 0.80 of width of lengthwise corrugation.

EFFECT: lowered metal consumption for making sections.

1 dwg, 1 ex