Stairways Inc offers aluminum spiral stairs in standard kits, welded stairs and heavy duty kits. Pictured is our standard aluminum spiral stair kit. Standard components, 3/16" checker plate spiral stair steps and landing. 3/4" round balusters, four per tread in photo for code compliancy. 1 1/4" round aluminum spiral stair handrail. Aluminum is a material that will not rust, perfect for coastal application. Decks often start at an elevated bottom, aluminum spiral stairs are about half the weight of steel requiring less structure to support. Stairways Inc aluminum spiral stairs standard are available with a mill finish. Mill finish indicates a product produced without a coating. Wet paint and powder coated finishes available. Options include spiral stair steps and landing, bar grating, radial grating, filigree, planetary, economy grate, wood and rubber overlay. Spiral stair balusters options, collars, castings and spiral cages, all can be designed in differing configurations. All wood rails available with aluminum standard kits. Aluminum spiral stair kits are lighter than steel and will out perform galvanized products when installed exterior.