Custom-made helical structure with painted steel side beam, steps and closed wooden riser.
The staircase has a helical structure made with external side bandof iron calendered to size and supplied with welded brackets for step support, with no visible screws.
The staicase protection railing is composed of curved panels of painted steel
The stepandclosed riser are made of water-painted solid wood and in a wide range of colors.
The self-supporting staircase is fixed to the floor at the start and to the slab at the finish.