FIELD: construction engineering; erection of wall made of monolithic concrete. SUBSTANCE: wall-forming component has long integer hollow extruded section 5, 6 rectilinear in sectional area and made of thermoplastic material; it is equipped with means for relative engagement of mating components for assembling to form wall structure in which two components 8, 9 of wall are spaced apart and form parts of external wall of wall structure. Section is extruded together with ensemble of walls which function as internal walls upon installation of component in wall structure; there are walls transversally passing between mentioned separated walls 8, 9 and are permanently joined to them; there is at least one wall parallel to mentioned separated walls 8, 9 which are at certain distance from them and joined to one of mentioned wall on each side for separating inner space of component to form at least one rectilinear section 16 to receive insulating material 38 and at least one rectilinear section 15, 22 to receive concrete. EFFECT: reduced construction cost; limited heat transfer without need for any special works. 13 cl, 19 dwg
