Installation library

Everything you need to build with confidence. Technical documents, engineered drawings, kit dimensions, installation manuals, and step-by-step video guidance.

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Spiral Staircases

A staircase designed around your space, your materials, and the way you want to move through a room.

A spiral staircase changes the character of a space. Tread coverings, spindle styles, handrail profiles, and stair finishes are all configurable at the time of order and are created end-to-end in our facility.

Technical Docs and Specs

Spiral Staircase Installation Videos

Animated Instructional Installation
Balcony Railing Installation
Center Pole
Assembly
Exterior Coverings Installation
In-Between Spindles Installation
Interior Wood Covering Installation
Introduction, Setup and Unboxing
Landing Railing Installation
Metal Handrail Installation
Multi-Line
Balcony Railing
Installation
Multi-Line Landing Rail Installation
Multi-Line Rail Installation
Parts Layout and Pre-Assembly
Riser Bars
Installation
Safety Gate
Installation
Treads and Landing Installation
Wireless Lighting Package Installation

SPIRAL STAIRCASE CODE REQUIREMENTS:

IRC 2012 Building Code

All of our spiral staircase kits are designed to meet these requirements. Confirm applicable code with your local jurisdiction before ordering.

Dimensions

  • Min. clear walking width; 26 in / 660 mm
  • Tread depth at 12 in from narrow edge: 7½ in / 190 mm min
  • Max rise per tread: 9½ in / 241 mm
  • Min. headroom: 6 ft 6 in / 1,982 mm
  • Min. landing width: 26 in

Handrail

  • Location: Wide edge of tread
  • Height from tread nosing: 34–38 in
  • Circular diameter: 1¼–2 in
  • Non-circular perimeter: ≤ 6¼ in

Guardrail and balusters

  • Stair baluster spacing: 4⅜ in max opening
  • Well enclosure baluster spacing: 4 in max opening
  • Well enclosure guardrail height: 36 in min

Structural

  • Concentrated load: 300 lb

Series Specs

Victorian spiral staircase with ornamental treads in a scroll pattern, viewed from above

Victorian Spiral Staircase

Ornamental scrollwork and cutwork embellishments across the treads, spindles, and handrail.

Shop series

Technical Docs

Carpenter spiral staircase with oak wood treads, spindles, and handrail

Carpenter Spiral Staircase

Every staircase is custom-made to exact floor-to-floor heights from hand-selected, kiln-dried Northern and Appalachian Red Oak.

Shop series

Technical Docs

Half turn spiral staircase with bronze treads and spindles, viewed from above

Half Turn Staircase

Engineered for restricted openings and low-headroom conditions where a standard spiral isn’t viable.

Shop series

Technical Docs

Floating Staircases

Open-riser construction that goes where conventional stairs can't — indoors, outdoors, and anywhere in between.

Iron Shop floating staircases are built for placement as a primary stair or for secondary access to a loft, balcony, deck, or finished basement, including center-of-floor-plan installations. Open risers and clean linear sightlines deliver a modern aesthetic without compromising structural integrity. Tread material, railing profile, and finish are all configurable, for interior and exterior settings alike.

Technical Docs and Specs

Combination Staircases

Spiral and straight stair construction, resolved into a single stair that works with the shape of the space.

The combination staircase pairs a spiral configuration with a straight stair run. It’s an ideal fit for where layout constraints or code requirements make a single stair type impractical. Designed and built in-house, each staircase is compatible with the full range of Iron Shop tread, railing, and finish options, and can be configured to the specific demands of the project.

Technical Docs and Specs

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