Outdoor steel Spiral staircase
The treads are produced from pressed steel with raised holes which have an non-slip function and allow rain water to drain away. The spacers between the treads allow the variation of the riser measurement. The railing of the staircase is made with steel columns. The handrail is made in black PVC. There is no balustrade. All the metal components are hot-galvanized; nuts and bolts are in stainless steel. Metal colour: galvanized steel.