Outdoor and Heavy Duty Spiral Stair Kits
As part of our extensive line of wood spiral staircases, metal spiral staircases and custom staircases both in kit form and fully assembled - Stairways Inc. offers standard and custom heavy duty spiral stair kits and other Outdoor Stairs, in both steel and aluminum. Heavy-duty spiral staircase kits are assembled in-house, and then dismantled and disassembled for economical shipment to you, the customer. Our disassembly process also allows for easy reassembly on the job site, with the added advantage of a finished metal spiral staircase appearance and finish. Standard heavy-duty spiral stairs are available in steel or aluminum.
Standard outdoor stairs and heavy-duty spiral staircase kits feature the following:
- Heavy Duty ¼ Base Plate
- 3.5 Outer Diameter Center Column
- Continuous Sleeve Tread Hubs
- Twelve (12) ¾ Solid Round Steel Balusters, complete with machined bottoms and milled top countersunk holes for attachment to the 1.5 Round Steel Handrail
- Eleven (11) 3/16 Steel Treads
- Complete Set of Fasteners
- Step-by-Step Assembly Instructions
Outdoor Stairs and Heavy-duty spiral stair kits are available in diameters from 40 to 72; tread sizes range from 18 to 34, with landing sizes from 21 to 37. Heavy-duty steel spiral staircase kits weigh from 403 pounds to 519 pounds; heavy-duty aluminum spiral stair kits weigh from 180 pounds to 275 pounds.
Optional handrails available with heavy-duty spiral staircase kits include:
- 1.25 Round Steel, Aluminum or Brass
- 1.5 Round Steel, Aluminum or Brass
- 1.5 x 2 Square Solid Wood (Oak), or specify preference
- 2 Round Solid Wood (Oak), or specify preference
Several types of balusters are offered with heavy-duty spiral stair kits, such as:
- 0.75 Center Square or Round, in Steel, Aluminum or Brass
- 0.75 Center, 4 Spacing, in Steel, Aluminum or Brass
- 0.75 Center with Collar, in Steel, Aluminum or Brass
- 0.75 Center Spiral in Steel
- 0.75 Center with Ornate Design, in Steel, Aluminum or Brass
Numerous styles of treads are available with heavy-duty spiral staircase kits, including:
- Bar Grating
- Radial Grating
- Checker Plate
- Smooth Steel with Oak Overlay
- Filigree Pattern
- Continuous Sleeves each tread sleeve is cut out to exact height (metal closed ends are optional)
- Traditional Pattern
Heavy-duty spiral stair kits produced by Stairways Inc. are more expensive, due to the special handling and manufacturing processes used in the construction of these units. Another advantage to our heavy-duty spiral staircase kits is all parts that are used for fully assembled spiral staircases are available for heavy-duty spiral stair kits (except for balusters). No matter what your heavy-duty spiral staircase kit requirements are, Stairways Inc. can meet the needs of your specific application call us today for prompt customer service!
- Easy To Assemble
- Interior Or Exterior
- Vinyl Or Optional Handrail
- Fast Installation Time
- No Welding Required
- Adjustable Height
- All Parts Included
- Any Height
- Hidden Welds
- No Special Skills Needed
- Any Diameter
- Space Saving
- All Steel Construction
- Fast Delivery Worldwide
- Stock Stair Can Be Installed In Either Clockwise Or Counterclockwise Directions
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
| Finish Floor Height || Number of Steps 30° || Degree of Circle |
|85" to 95"||9||270|
|96" to 104"||10||300|
|105" to 114"||11||330|
|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.
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.
Heavy Duty Kit:
Standard Heavy Duty Kit includes a 3 1/2" OD center column, heavy duty 1/4" base plate, (11) 3/16" steel treads, (12) ¾" solid round steel balusters, with a machined bottom and milled top countersunk holes for attachments to the 1½" round steel handrail, continuous sleeve tread hubs, complete with fasteners and instructions of installation of the stair.
| Heavy Duty Kits |
| || Steel || Aluminum || |
| Diameter || Model# || Weight (lb.) || Model# || Weight (lb.) || Tread Size || Landing Size |
Houston, TX 77018
Tel: (713) 680-3110
Fax: (713) 680-2571
Tollfree: (800) 231-0793
Web site: http://www.stairwaysinc.com