General specifications:

 All aluminum
Baked on powder coated finish in
textured black or off white.
Code diameter 5'
Each tread 30 degree rotation, 12 treads 360
degree. Treads exceed all national codes.
Maximum rise 9.5"
Center post 4" diameter .25" wall

Spiral Stairs Seattle Aluminum

Tread material diamond plate .25" thick
Platform material diamond plate .25 thick
Balusters .75" square or round.
No more than 4" opening between balusters.
Handrail cap rail 1.5" round.125"
Platform 32x32" , 5"x32" flange for attachment
to deck band, drilled for 5-.50" holes.
Floor flange 8" diameter with 4-.50"
The stair will be built so headroom under the platform
is more than 78"

The cost of a stair built to these specifications and a rise of 115"
$6,000.00 plus tax and delivery

Lockable gate adds $400 at platform edge.  Matches style of

stair handrail.

 included if less than 30 miles from Seattle.


Acme Metal Designs
253  217 3801

Spiral stairs are built in one piece to fit the site.  All aluminum construction. Never will rust.  Powder coated finish.

Platforms and treads can be designed for each stair.

Stairs ship in one piece on our trailer.  Easy installation.