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Spiral Staircase Kits:

For over thirty years, Stairways Inc. has designed, produced, and delivered metal spiral staircases and metal spiral stair kits to commercial, industrial and residential clients throughout the United States as well as worldwide. Metal spiral staircase kits from Stairways Inc. are available in stainless steel, marine grade aluminum and galvanized steel versions. Other options, such as wood handrails or wood treads (or both) are available with other metal components. In other words, you, as the client, can mix and match to customize for your specific tastes.

Stairways Inc. standard metal spiral staircase kits in galvanized steel are delivered ready to assemble in a red oxide primer finish. Metal spiral stair kits are available in three finishes, including a Number 4 brushed finish, a Number 7 mirror finish and a mill finish. Metal spiral staircase kits meet UBC (Uniform Building Code) and BOCA (Building Officials and Code Administrators International, Inc.) codes; we recommend you check with your local building department or local building inspector before ordering a Stairways Inc. metal spiral stair kit.

Metal spiral staircase kits from Stairways Inc. have many advantages and benefits, including

  • Fast Installation, Easy to Assemble - can be installed by two people in less than a day, using regular tools and no expensive equipment
  • Steel, Aluminum, or Stainless Steel Construction
  • Standard Staircase can be installed in either counterclockwise or clockwise direction
  • Delivered with Vinyl or Optional Handrail
  • Space Saving
  • Adjustable Height

  • Available in any height or diameter
  • No Welding Require
  • All necessary parts included with kit
  • Hidden Welds
  • Metal Staircase Kit Components are manufactured with hidden welds
  • Fast Delivery nationwide and worldwide

Standard metal spiral stair kits also feature a ten-inch square, one-quarter inch thick metal base plate; eleven (11) ¾" steel balusters; a 3.5" outer diameter column; a 36" tall landing rail complete with ¾" balusters; eleven (11) 12-gauge smooth steel treads, a length of 1 and ¼" black vinyl handrail; and a complete set of fasteners and step-by-step instructions. Steel and aluminum standard metal spiral staircase kits range in diameters from 40" to 72"; tread sizes from 18" to 34"; and landing sizes from 21" to 37". Steel standard metal spiral stair kits weigh from 270 pounds to 360 pounds, and aluminum metal spiral staircase kits weigh from 135 pounds to 190 pounds.

Having successfully met the specifications of thirty-plus years' worth of customers with a wide array of metal spiral staircase kits, Stairways Inc. is ready and willing to meet your delivery requirements for standard and custom metal spiral stair kits. Call the staff here at Stairways Inc. for all your metal spiral staircase kit needs!


  • Easy To Assemble
  • Fast Installation Time
  • All Parts Included
  • No Special Skills Needed
  • Space Saving
  • Economical
  • Stock Stair Can Be Installed In Either Clockwise Or Counterclockwise Directions
  • Interior Or Exterior
  • No Welding Required
  • Any Height
  • Any Diameter
  • All Steel Construction
  • Fast Delivery Worldwide
  • Vinyl Or Optional Handrail
  • Adjstable Height
  • Hidden Welds


BOCA and UBC codes require a minimum 60" diameter (64" wood) with 30° treads and a 4 inch baluster spacing. Before ordering, check with your local building inspector for your code requirements.


Our Kit Stair systems come in a box with instructions and can be installed by two people in less than a day without the need for any special tools or expensive equipment.

Table of Risers

of Steps
85" to 95" 9 270
96" to 104" 10 300
105" to 114" 11 330
115"to 123" 12 360
124" to 133" 13 390
134" to 142" 14 420
143" to 152" 15 450
153" to 161" 16 480
162" to 171" 17 510
172" to 180" 18 540


12 Treads per circle. Make opening 2" larger than stair diameter.11 Treads are standard.

Standard Spiral Kit:

We can ship these kits fast and economically mostly from stock. Universal direction and readily available in heights up to 114". Taller elevations are available.

All Wood Spiral Kit:

All solid wood construction. 12 sided center column. Each all wood kit stair is built by hand, disassembled and placed into a box ready for shipment. It can be used with other options we offer like additional balusters, and custom handrails from the completely assembled wood stair line.

Heavy Duty Kit:

Built with 3/16" steel treads, 3/4" solid balusters milled to fit the exact angle of handrail. Built one stair at a time, disassembled, and placed in a box ready for shipment to your jobsite. For residential and industrial installations that require kits, this stair is the best.

48 SKD w/ oak handrail and treads
48 SKD Standard Kit
48 SKD w/ 1-1/4" Rd. brass handrail, 3/4" Rd. brass balusters and oak treads
72 HDKD Heavy Duty Kit, Aluminum
48 AL-KD Standard Aluminum Kit

QUICK LINKS: Spiral Stairs, Spiral Staircase, Spiral Staircase Kits, Spiral Stairs, Outdoor Stairs, and Spiral Stair Kits                             

Stairways Inc., 4166 Pinemont Houston, TX 77018
Phone:(713) 680-3110
Fax:(713) 680-2571
Toll Free:1-800-231-0793
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