METHOD OF LIGHTWEIGHT METAL STRUCTURES MANUFACTURE Russian patent published in 2008 - IPC B21D47/00 E04C3/08 

FIELD: technological processes.

SUBSTANCE: method includes breaking-up of initial element along zigzag line with provision of trapeziform bulges, with angle of side walls inclination of 45 degrees, joining along bulges, further breaking-up along serrated line with the right angle between side of teeth that are parallel to side walls of trapeziform bulges and joining of performed elements with the help of isosceles angle bars sections. Total number of trapeziform bulges is 3+2k (k 1, 2, 3...), height of trapeziform bulges is 0.2-0.45h_"б", length of smaller base 0.2 h_"б", where h_"б" - height of initial element section.

EFFECT: reduction of manufacture labour-intensiveness and increase of bearing capacity and wastelessness of production.

7 dwg