The frame comprises six parts of V2A tube, of 38x3 diameter, comprising elongated tube lengths between 1300 and 1400 mm, being also bent and twisted. The tube parts cab be connected with a socket of a 100 mm length and secured by connecting bolts of 60 mm in length, screwed on both sides to three components by wing screws. Three components are put together to form an equilateral triangle with three double openings for the accommodation of three telescopic rods secured underneath the double openings by connecting bolts of 100 mm in length. Pre-assembly securing is achieved by screwing and installation after holes and eyelets are made. The diameter of the basic frame is approximately 2,200 mm.