Stocklin Iron
Spiral Stairs
&
Iron Fabrication
Standard Models
Designed as a Ready To Install Callout, or Used As Starting Point for Custom Work.
Our standard spiral stair models are designed to provide a strong foundation for custom fabrication. Each model offers a distinct design style, giving homeowners and designers a clear starting point while still allowing flexibility in finishes, proportions, and detailing. This approach makes it easier to achieve a staircase that feels intentional, well-matched to the home, and built to last.
What Customizations are possible?
We proudly offer the capability for any customer to customize the design of the stair in a close to limitless amount of details, including the material used for the top rail, the pickets or ballusters in the railing, step material, custom step banding (which can allow for LED Lighting), and more!
Sizing & Dimensions
Standard 5'-0"
The smallest spiral stair that is legal to CA building code is 5'-0" diameter. This is a very common option for tight spaces, occasional use, or interior applications.
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Standard 6'-0"
The upgrade to a 6'-0" diameter spiral stair is minimal to surrounding area, but noticeable in comfort. For exterior useage this is a common option, and best for pathways that may feature frequent traffic or useage while carrying items.
"What size stair is right for me?"
Choosing the right spiral stair size depends on a combination of available space, intended use, and comfort. Diameter plays the biggest role, as it affects walking width, headroom, and how easily the stair can be navigated day to day. Smaller diameters work well for occasional access or tighter footprints, while larger diameters provide a more comfortable feel for primary use and frequent traffic. Ceiling height, landing configuration, and local code requirements also influence sizing. Reviewing these factors together helps ensure the stair fits the space properly, functions safely, and feels proportionate within the home.
Circumstances where building code may not be applicable, allows for a greater diversity of compact stair sizes.
Spiral Stair Finishes
Standard Finishes & Corrosion Resistance:
All standard spiral stair models are supplied with a single coat of shop-applied primer. This finish consists of a direct-to-metal red oxide primer applied at our facility, with touch-ups performed on site as needed during installation. The shop primer is intended to protect the steel during fabrication, handling, and installation, but it is not designed to serve as a long-term finish.
For lasting corrosion resistance and long-term performance, a professional, environment-appropriate finish must be applied by others within a reasonable timeframe after installation. Final coating selection and application should account for the stair’s location, exposure conditions, and intended use. Delaying final finishing may result in increased maintenance needs or surface corrosion over time.
Tread Materials
Flat Plate
Flat plate treads are our standard step material and serve as the foundation of our spiral stair designs. Chosen for their strength, reliability, and clean visual profile, flat plate steel provides a solid, consistent walking surface that performs well across a wide range of residential and light commercial applications. This material allows for precise fabrication, tight tolerances, and consistent step geometry, which are critical to the overall comfort and safety of a spiral stair.
Diamond Plate
Diamond plate, also referred to as floor plate, offers a more rugged and visually expressive alternative to flat plate treads. Characterized by its raised pattern, this material introduces added texture while bringing a distinctly industrial aesthetic to the stair. Diamond plate treads are often selected for spaces where durability and a bold visual presence are priorities, making them a strong fit for workshops, loft-style homes, garages, and utility-driven environments.
Industrial Options
We offer three industrial tread options: bar grating, perforated sheet steel, and Perf-O-Grip. These materials are designed to provide increased traction and durability, particularly in environments where moisture, debris, or heavy use may be present. Their open or textured surfaces allow for drainage and grip that standard flat plate treads do not provide.
While highly effective for industrial and commercial applications, these tread styles are typically specified only when functional requirements call for them. Due to their aggressive texture and industrial appearance, they are generally not recommended for residential applications unless special conditions exist. When used appropriately, industrial treads offer reliable performance in demanding settings.