Interior of modern apartment became fashionable to decorate various architectural forms. These include decorative arch, installed in the openings of corridors. The construction of the arch (Fig. 2) consists of two shaped plates, made of chipboard with thickness of 12…16 mm, sewn stripes hardboard (fiberboard) 5-mm thickness. The arch is fixed in the opening of the wall by means of screws and wooden bosses mounted on the support-base that is attached at the top of the opening. Making the arch begins with the selection of the shape and size of the circuit (in the figure, are the most common form). The contour of the arch is drawn on a piece of cardboard in full size. The layout is only one half to use it as a template for a complete circuit (see figure).
If the opening has a bevel on the vertical walls, the dimensions of the circuit must be set at the minimum distance (size 1_1). For this purpose the markings are first, the small plate with the obligatory marking of the axis of symmetry of the arch. Then this axis is applied to the plate of a larger size with the bevels.
After marking each plate is cut by a narrow hacksaw (saw blade of the hacksaw blades), and then is processed finally with a file and sandpaper.