Wagner Companies

Order Guide

  1. DIAMETER
    Common sizes of spiral stairways range from 3-1/2' to 6' diameter. A 5' diameter spiral stair meets requirements of many building codes. Custom Diameters are available upon request. The finished opening should be 4" larger than the stair diameter to assure proper handrail clearance.

Tread Dimensions
Dimensions C and D are from the nosing of one tread to the nosing of the next tread.

Spiral Stair Diameter

Diameter of Your Stair
3-1/2'
4'
4-1/2'
5'
5-1/2'
6'

A (radius)
21"
24"
27"
30"
33"
36"

B
18"
21"
24"
27"
30"
33"

C @ 30º
10-1/4"
11-3/4"
13-1/4"
15"
16-1/2"
18"

D @ 30º

7-1/2"
7-1/2"
7-1/2"
7-1/2"
7-1/2"
7-1/2"

C @ 27º

9-1/4"
10-3/4"
12"
13-1/2"
14-3/4"
16-1/4"

D @ 27º
6-5/8"
6-5/8"
6-5/8"
6-5/8"
6-5/8"
6-5/8"


2. HEIGHT: Measure the vertical distance from finished floor to finished floor. The stair is not adjustable.

Tread Quantity is determined by finished floor to finished floor height divided by 9.25

From 88" to 95"

9 treads From 123-1/2" to 133" 13 treads
From 95” to 104-1/2" 10 treads From 133" to 142-1/2" 14 treads
From 104-1/2" to 114" 11 treads From 142-1/2" to 144" 15 treads
From 114" to 123-1/2" 12 treads    

3. PLATFORM STYLE

A. No Platform 90º corner by others. Shown with 27º treads – see Degree of Rotation at right. Please determine the upper floor system thickness and then check with us.

B. Designed for use in a stairwell. The stairwell is assumed square unless specified round or otherwise. B platforms connect at two sides to the opening. If the finished opening is not 4" larger than the stairway, please provide dimensions.

C. Designed for attaching to a balcony and has railings on two sides.

D. Designed for attaching to a balcony and has an L shaped railing on two sides.

Custom platforms are often required when access is limited. Please contact Wagner.

4. DEGREE OF ROTATION
30º Many building codes require 30º treads. Spiral stairs with platform B,C or D are supplied with 30º treads unless specified otherwise. 27º Stairs with no platform are supplied with 27º treads to increase headroom under your 90º corner -- unless otherwise specified.

Custom tread rotation is also available.
BALCONY RAILINGSSpiral Stairs Balcony Rail
Down to the left
Counter Clockwise

Down to the right
Clockwise

Spiral Stair Degree of Rotation

 

 

Balcony railings can NOT be cut to length on site. Balcony railings are very sturdy because they are built to job specifications. All posts are welded to the railing.

Let us determine the railing lengths. Supply a sketch of the finished opening with your order, including drywall or other finish material. The examples in this section illustrate the type of information required for railings to be built accurately.

Safety balcony railings are designed 36" tall with spaces less than 4" – unless otherwise specified. This complies with most residential building code requirements.

GLOSSARY OF TERMS
Spiral Staircase Glossary of Terms

Technical Specifications

  • CONSTRUCTION
    • KD Unless otherwise noted, all spiral stairs are shipped Knocked-Down. A KD stair is not a kit. Enjoy the confidence of knowing your stair is completely assembled during fabrication. This minimizes field assembly time and assures a quality product.
    • SU A stair that’s shipped Set-Up has all welded connections. It cannot be knocked-down.
  • MATERIAL
    • A variety of materials can be used for the basic stair center column and tread frames:
      • Steel – assumed unless specified otherwise
      • Galvanized Steel – actually zinc-plated steel
      • Aluminum – will usually have tapered tread legs
      • Stainless Steel – brushed finish

        EXTERIOR STAIRS
        Aluminum or galvanized steel are recommended for exterior applications to prevent corrosion. An SU steel stair is also an option, but packing and freight costs can be substantial. A KD steel stair is intended for interior use only.

  • TREAD AND PLATFORM SURFACES
    • All thickness listed below are actual.
      • Frame Only: A pattern is supplied. The stair will be built for your 3/4" particle board with carpet.
      • Carpet Grade: 3/4" high-density particle board on the treads and 3/4" CDXU plywood on the platform.
      • Red Oak Edge: 1-1/2" Red Oak and 3/4" particle board.
      • Hardwood: A 1" tread is available for all sizes.
      • Cedar Deck: 1" x 5-1/4" decking.
      • Pan: Build for your appliction. Our standard pan is made of 12 gauge steel and is 11/4" deep.
      • Smooth or Checkerplate: 12 gauge steel is standard.
      • Radial Grate: The maximum space is less than 1".
      • Glass Block: 1" thick block set in a special pan.
      • Laminated Glass: 1" thick laminated glass set into a special fram
  • RISERS
    • Closed risers are required to meet some building code requirements. Our optional closed risers will pass the 4" sphere test.
  • CLOSURES
    • Available to conceal the bottom of the tread frame. Depending on the tread surface chosen, flathead screws may be visible. They may be puttied, sanded smooth and then painted over during installation.