1-800-231-0793 / 713-680-3110

Spiral Staircase Kit Installation Instructions

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.

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

Step Seven:

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

Fig. 4.i

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

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).


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)

Fig. 5.l


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 )

Stairways Inc., 4166 Pinemont Houston, TX 77018

Phone: (713) 680-3110

Fax: (713) 680-2571

Email: swinfo@stairwaysinc.com

Toll Free: 1-800-231-0793

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