Metal Spiral Stairs in Southern New HampshireSee Some Of Our Metal Spirals Below Get in Touch Boston Stair Provides Metal Spiral Stairs in Southern New Hampshire Take a look at some of our metal stair work below and contact us for an estimate Black Kit Wood Treads Cont. Hubs 5'-0" Diameter; Custom metal with horizontal lines; Red Oak treads and handrail; Buttress Stringer; Powder Coat Finish Code 5'-0" Diameter Exterior galvanized Kit Custom built Exterior Aluminum stair with Powder Coat Finish; Teak inlay treads Hand built Exterior Aluminum spiral with Diamond Plate treads. Second handrail wraps center pole; Powder Coat Finish Special Design Handrail Over Curved Mesh Panels Horizontal line metal with oak treads 4 ft. diameter RESIDENTIAL WORK IN CAMBRIDGE, MA CUSTOM EXTERIOR SPIRAL STAIRS, BASEMENT CONCRETE STAIR HAD CUSTOM RAILINGS CUSTOM BUILT SPIRAL WITH DIAMOND PLATE TREADS AND POWDER COAT FINISH Filigree Tread Brushed Silver See More of Our Work