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This spiral staircase represents a simple Victorian era cast iron spiral staircase suitable for industrial applications or for simple exterior residential or commercial applications. The staircase has a diameter of 5 feet and a step rise of 8 inches with twelve steps and a top platform. The rotation is 360 degrees (the stairs traverse a full circle). The staircase connects two floor levels 8'8" different in height. The railings are 36" high. Modified versions of this staircase can be made upon request, including different step rises, more steps and different railing heights. Please contact us to request your desired variations.