Abstract: The securing element (16) for tensionally fastening additions like roof balustrades (14), exterior stairways (15), roofs (11), arbors, greenhouses (13), pergolas (12), advertising elements, poster walls, etc. that function as extensions or expansions, to structures, especially single-story structures erected with with a kit of components. The securing element (16) extends over the total length of one side of the main structure (10) and has at least one fastening rail (22 or 23) that extends over its own total length.

Abstract: A kit of components a structure consists of a basic element (3) consisting, in the form of a hollow structural section like a cellular space with a rectangular cross-section, of two parallel side walls (1a) and of a floor slab (1b) and roof slab (1c), leaving two openings (3b), of a two-part folding door (6) that can be set into one of the two opening to constitute a front element, that can be fitted against each vertical side of the opening, and that consists at least partly of light-permeable material, each part of which has at least two wings that can be swung around axes parallel to the vertical front side, whereby the folding door (6) does not when it is open and folded back toward the two vertical front sides extend into the interior of the cellular space.