Dimensions Guide

Spiral Stair Kit Dimensions
Diameter
Minimum
Finished
Opening
Clear Walk
Space
Between Pole
and Rail
Square Landing
Size
Degree of Tread
Rotation
Center Pole
Diameter
Base Plate
Diameter
Standard
Handrail Width
3'6" Standard 3'8" x 3'8" 1'6" 1'10" x 1'10" 30° 3-1/2" 10" 1-1/4"
4'0" Standard 4'2" x 4'2" 1'9" 2'1" x 2'1" 30° 3-1/2" 10" 1-1/4"
5'0" CODE 5'2" x 5'2" 2'2-3/8" 2'7" x 2'7" 30° 3-1/2" 10" 1-1/4"
5'6" CODE 5'8" x 5'8" 2'5-3/8" 2'10" x 2'10" 30° 3-1/2" 10" 1-1/4"
Houston, Ontario and Elk Grove models are available in all diameters listed. Venice model is only available in 5'0" CODE diameter.