Our Classic Steel spiral stair is our first and most popular model of spiral staircase. For over 35 years we have manufactured this model and it has stood the test of time and durability. This circular stair has a number of options for customization including height, diameter, wood, handrails, and balusters. Any homeowner, architect, or designer will be happy to know that most are sold as a spiral stair kit it saves time and money transporting and assembling our stair.
Other modifications available include the choice between stock circular or continuous sleeve setup, as well as powder coating in the color of your choice. For new construction or an addition/renovation our classic steel spiral stair will fit your style and budget. With no special tools required for installation any DIY homeowner or contractor can install one. See how the stair is assembled at our “Steel Stair Installation“.

Standard (CT-1) steel tread with closed end. Holes are pre-punched so the tread can receive optional wood tread coverings.
Curved up (CTC-2)
steel tread with closed end. Provides that thin look. Holes are
pre-punched so the tread can receive
optional wood tread coverings.
Long curved (CT-4)
steel tread with closed ends. Holes are pre-punched so the tread can receive optional wood tread coverings.
Ivy stencil (CT-5) steel tread with closed ends. Holes are pre-punched so the tread can receive optional wood tread coverings.
Code riser (CT-6) steel tread with closed ends. Code risers will maintain a space less then 4″ between treads. Holes are pre-punched so the tread can receive optional wood tread coverings.
Grated (CT-8) steel tread with closed end. Grated treads allows water, ice and snow to fall through the tread, whiling providing a unique open feel. Also available in a 3/16″ thick heavy-gauge version. (Not available in a diamond pattern)
Industrial Heavy-Gauge 3/16″ (CT-9) steel tread with rounded closed end. These treads are made with extra thick steel plates for additional strength.
Choose A Classic Steel Spiral Stair Design From The Following Options: