Little space was available for the expansion and reorganisation of these metalworking business premises. Planning was hampered by the need for truck access on the east side. By reduction of the storage area on the first floor, room was made for additional office space and a toilet, both reached via the new staircase enclosed in a semi-circular extension of steel and glass brick. The curved wall also signals the entrance to the building. The expanded steel staircase with filigree detailing rests on a 25 mm load-bearing steel plate section. Its seeming fragility is deceptive. The steps and handrails are of stainless steel. The openwork construction allows maximum light to filter through to the existing office on the ground floor.