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Spiral Staircase Kits / Spiral Stairs Kits

Stair Kits

See Kit Stair Installation Instructions Below:

  Vinyl

  Steel Handrail with Optional Center Balusters

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   Available in any height or diameter
   Steel, Aluminum, or Stainless Steel Construction   No Welding Require
   Standard Staircase can be installed in either counterclockwise or clockwise direction   All necessary parts included with kit
   Delivered with Vinyl or Optional Handrail    Hidden Welds
   Space Saving   Metal Staircase Kit Components are manufactured with hidden welds
   Adjustable Height   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) ” steel balusters; a 3.5” outer diameter column; a 36” tall landing rail complete with ” balusters; eleven (11) 12-gauge smooth steel treads, a length of 1 and ” 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!  

Stair Features:

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

 

Code:

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.

Installation:

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

30°
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
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

Layout

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 AWKD
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

Standard Kits

Includes a 3.50" OD center column with a 10" square ¼" thick base plate, formed landing, 11 - 12 gauge smooth steel treads, 11 ¾" square steel balusters, and a coil of 1 ¼" black vinyl handrail, 36" tall landing rail with ¾" balusters, standard red oxide primer finish, and all necessary fasteners and instructions.

Standard Kits
  Steel Aluminum  
Diameter Model# Weight (lb.) Model# Weight (lb.) Tread Size Landing Size
40"
48"
52"
60"
64"
72"
40-SKD
48-SKD
52-SKD
60-SKD
64-SKD
72-SKD
270
290
300
325
340
360
40-AKD
48-AKD
52-AKD
60-AKD
64-AKD
72-AKD
135
146
153
166
174
190
18"
22"
24"
28"
30"
34"
21"
25"
27"
31"
33"
37"

All Wood Spiral Kit

Standard Wood Spiral Kit includes center column, base plate, (11) 1 ¼" wood treads, (12) 1 ¼" square wood balusters, solid oak handrail 1½" X 2", with all fasteners and instructions needed to assemble the stair. The wood spiral can be assembled around a twelve-sided solid oak column. The red oak treads are mortised and screwed into the center column. The balusters are attached to the end of the tread, and bolted into the fine curved top handrail. After assembly, the solid oak spiral stair kit looks like a fine piece of furniture.

Wood Kits
  Wood  
Diameter Model# Weight (lb.) Tread Size Landing Size
40"
48"
52"
60"
64"
72"
40-WKD
48-WKD
52-WKD
60-WKD
64-SKD
72-WKD
202
231
250
290
308
347
18"
22"
24"
28"
30"
34"
21"
25"
27"
31"
33"
37"

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
40"
48"
52"
60"
64"
72"
40-SKD-HD
48-SKD-HD
52-SKD-HD
60-SKD-HD
64-SKD-HD
72-SKD-HD
403
430
444
460
492
519
40-AKD-HD
48-AKD-HD
52-AKD-HD
60-AKD-HD
64-AKD-HD
72-AKD-HD
180
200
210
230
245
275
18"
22"
24"
28"
30"
34"
21"
25"
27"
31"
33"
37"

 

Standard Spiral Kit Options

[Call For All Wood or Heavy Duty Kit Options ]

 

 

Handrails

 

1-1/4" Round
Steel, Alum., Brass
1-1/2" Round
Steel, Alum., Brass
1-1/2" x 2" Square
Solid Wood, Oak, Specify
2" Round
Solid Wood, Oak, Specify

Balusters

3/4" Center
Square or Round
Steel, Alumn., Brass
3/4" Center
4" Spacing
Steel, Alumn., Brass
3/4" Center with Collar
Steel, Alumn., Brass
3/4" Center
Spiral
Steel
3/4" Center with Ornate Design
Steel, Alumn., Brass

Treads


Checker Plate

Bar Grating

Continuous Sleeves
Each Tread Sleeve
Cut out to Exact Height
* Metal closed ends optional

Filigree Pattern

Smooth Steel
with Oak Overlay

Radial Grating

Traditional Pattern

 

 

 

Kit Stair Installation
Standard Kit Stair - Steel or Aluminum

 


Fig. 1. a

Receiving your Order

When you receive your kit stair, unpack it and make sure you have received all of your parts according to your proposal order we have sent you. It will show you the number of treads; balusters; landing; handrail and guard rail.
( Fig. 1.a )

Tools needed for installation

There are no specialty tools needed for this installation.

You will need a drill & drill bits (1/8", 3/8", and 5/16"); hammer; level; measuring tape; flat head screw driver; a tri-square (optional) and small set of tools (wrenches and socket set).


Fig. 1. b

Getting started

Step One:

Stand center column in the opening and slide treads, pan face down (flat surface up), onto the column.  The treads are all the same. Partially tread set screws into treads making sure to slide the landing on last. ( Fig.1.b )


Fig. 2. c

Installing the stair

Step Two:

Slide the landing platform over the center column to the desired finish floor height. (If your stair takes a wood overlay lower the landing by that thickness of the wood overlay). Using the lag screws supplied, attach the landing flush with the finish floor. Level the center column and attach the base plate to the floor with anchors supplied. Next level the landing and tighten the set screws.  ( Fig. 2.c )


Fig. 2. d

Step Three:

Starting with the top tread, place a main baluster in the slot closest to the landing and attach the baluster to the tread with a 1/4" x 1 1/2" carriage bolt, nut and washer supplied. Make sure that the flange on the top of the main baluster is facing away from the tread.   ( Fig. 2.d )


Fig. 3. e

Step Four:

Align the top tread up to the proper riser height listed in the order. If your tread has wood overlay, lower the tread by the thickness of the wood overlay. The riser height is measured from the top of the landing to the top of the tread below. Next level your main baluster and bolt it to the landing and then level the tread and tighten the set screws on the sleeve. (Always tighten balusters bolts first and the set screws on the sleeve last)

See ( Fig. 3.e )


Fig. 3. f

Step Five:

Slide the next tread up and follow the procedures in Step four. Continue this procedure with the remaining treads. The last baluster only has two holes 1" apart. Level it and fasten to tread and to the floor by using the 3/4" shoe and anchor bolts supplied.

Your stair should look like this ( Fig. 3.f )


Fig. 3. g

Step Six:

Next lay your handrail on top of the balusters making sure you leave enough overlap on both ends of the rail to be trimmed off later. Starting with the second baluster from the bottom, drill a pilot hole with a small drill bit (1/8") from underneath the baluster into the handrail. Next slide the handrail to one side and drill a 3/8" hole into the pilot hole. Insert the toggle bolt with the washer into the baluster as shown in ( Fig. 3.g )

Then insert the toggle bolt into the handrail and loosely tighten the bolt.  Follow the same procedure for the balance of the treads working your way to the top baluster. Attach the bottom baluster last.


Fig. 4.h


Fig. 4. i

Step Seven

Cut the ends of the handrail approximately 1/2" away from the bottom and top baluster and insert plastic end caps.

See (Fig. 4.h) before
and see ( Fig. 4.i ) after


Fig. 4. j

Step Eight:

The next process is to attach the landing rail or rails. Place the landing rail on the side of your stair which is required by your order and using the self drilling and tapping screws supplied, fasten the top of the landing rail to the center column at a position 36" above the landing. After the top of the landing rail is attached, drill a 5/16" hole in the outside rail post from underneath the landing slot and bolt with a 1/4" x 1 1/4" carriage bolt supplied.  ( Fig. 4.j )

Finish:

Check to see that all bolts and set screws are securely fastened.  Your stair is then finished and ready for painting.

 
Fig. 5. k


Fig. 5. l

Installing the wood overlay (Optional)

After you have installed the landing; treads; balusters and handrail and guard rail, it is time for the wood overlay.

(Make sure you have allowed for the thickness of the wood during the installation of your metal landing and treads).

Landing

Drill a 5/16" hole on top of the landing approximately 2" away from each corner and place wood overlay on top of the steel landing and fasten from underneath with the screws supplied. ( Fig. 5. k)

Treads

As before you will need to drill holes on top of the metal treads for the wood overlay. This time you will need to drill three 5/16" holes.

From the widest part of the metal tread drill a 5/16" hole approximately a 1 1/2" away at each corner.

Next drill a 5/16" hole at the smallest part of the metal tread by the pipe sleeve approximately 3" away in the center.

Place the wood overlay on top of the steel tread and fasten from underneath with screws supplied.

Follow the same procedure for the balance of the treads. ( Fig. 5.l )

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