Spiral & Modular Stair Kits

Our Products:

Eureka Spiral Staircase

Interior/Exterior Painted Steel

The EUREKA model is available in 3 diameters- 3 ft. 11 in., 4 ft. 7 in., and 5 ft, 3 in.

It is available in 3 colors- black, white and grey-powder coat finish painted- ready to install- clockwise as well as counter-clockwise. The EUREKA series undergoes two processes for protection in the exterior applications. First an electrostatic galvinization process is used for the base protection followed by a second application of the powder coat pain application.

The standard EUREKA staircase kit is adjustable in height from a range of 8ft. 3 1/4 in. to 10 ft. 1/8 in. and with the additional components, can be extended to a maximum height of 12 ft. 4 in. or to a minimum of 6 ft. 10 in. Additional riser kits can be purchased separately.

Please Note: the measurement values on the configuration tables are reflected in inches and eighths of inches. For example: 75.3 inches = 75 3/8 inches. Also note that the configurator opens in a pop-up window. If you have a pop-up blocker enabled you will need to disable or make an exception for this site.


The EUREKA stair treads are made of solid steel, with durable plastic tread covers. The handrail and the staircase finishes are in grey PVC for the white and grey staircases and in black PVC for the black staircases.

This kit can be used in square, round or mezzanine applications. To allow for proper installation and full clearance, the finished opening MUST be at least 2 INCHES GREATER than the diameter of the staircase kit.

To complete your project a BALCONY RAIL kit is available. The BALCONY RAIL kit comes complete with 10 balusters, handrail, and all the necessary hardware to complete a 3 ft. 11 in. installation. The BALCONY RAIL kit is available in the same colors as the EUREKA staircase kit.



SAFETY BARS are available in a set of 12 to close off the back of treads.

Each EUREKA staircase kit is shipped complete with detailed assembly instructions and a DVD to assist in your installation. You can also view an installation video on our website at www.arkestairs.com.