Stair with a single supporting structure on the wall side in varnished metal of 10 mm which has been shaped by a laser, wooden treads in lamellar beech of 40 mm, external tread distance element to connect and support the treads in varnished metal of ø 33 mm. Railing mod. RAIL in metal and double plat uprights of 40x10 mm, 5 horizontal parallel tubes of ø 10 mm, circular metal handrail of ø 42 mm.