Outdoor Spiral Staircase

Outdoor spiral staircases are usually used in public places. It usually made of stainless steel or carbon steel, and hot dip galvanized is a necessary process. In some cases straight staircases are used. Specification Reference Stair diameter range :1194-2032mm(47″-80″) Central post diameter 114mm(4- 1/2″) Thickness of treads: 4~10mm steel checkered plate Railing options: stainless steel…