METHOD FOR MAKINGS LIGHT-WEIGHTED METAL BEAM Russian patent published in 1995 - IPC

FIELD: civil engineering, metalwork production. SUBSTANCE: first origin beam wall is cut over horizontal cutting lines in checkered order, then over vertical lines. In so doing, both upper and lower horizontal lines are overlapped by "h" value, where "h" is projection height. Length of horizontal cutting lines is 2.828h, distance between the lines is 0.828h. Squares cut off the wall are cut in half over diagonal, the triangular are welded with their legs to form triangular insertion pieces. Five-cornered elements with right angle at apex are cut off from projections of upper half-beam. The elements are cut in half height. The halves are welded to one another to form elements with V-shaped projections. The elements formed are welded to projections of the lower half-beam. End elements and triangular insertion pieces are welded too. EFFECT: decreased amount of man-hours in beam production, increased bearing capacity of the beam. 8 dwg