FIELD: construction.
SUBSTANCE: invention relates to construction, namely, to long-length building metal lattice constructions made of pipes. Tubular element product includes horizontally and/or vertically oriented elements and/or elements oriented in an arbitrary order. Elements are made, mainly, from a pipe. In the zone of joining the elements together, the profile of at least one element is modified by deformation inside the pipe wall from two diametrically opposed sides with the formation of transition zones from the deformed sections to the main material. In the cross section of the deformed section, a profile is formed, consisting of two C-shaped halves facing each other with their internal parts.
EFFECT: invention can be used in the manufacture of trusses, girders, columns, arches, frames, decorative brackets and other supporting structures.
6 cl, 7 dwg
