Steel Stair Stringers
Custom-fabricated steel stair stringers engineered for your specific rise, run, and span requirements. Available in closed, open-cut, and mono stringer configurations for both interior and exterior applications. Stronger, more precise, and more durable than wood—built to eliminate flex and provide a solid foundation for treads of any material.
Behind every staircase is a structure doing the real work. Stair stringers—the diagonal supports that carry the treads and bear the load—determine whether your stairs feel solid and permanent or hollow and uncertain. Steel stair stringers offer structural advantages that make them the preferred choice for demanding applications, longer spans, and designs where the structure itself becomes part of the aesthetic.
Mountain Metal Works fabricates custom steel stringers in several configurations: closed stringers that remain hidden beneath treads, open stringers with cutouts that stay visible, and mono stringers—single center-spine designs that create a floating, cantilevered appearance. Each is fabricated to match your exact rise, run, and span dimensions.
Steel carries greater loads across longer spans without the flex or bounce wood stringers can develop. For exterior applications in Tahoe’s climate, steel eliminates concerns about rot, warping, and pest damage. Precision fabrication means tighter tolerances—every tread sits level and every riser matches exactly.
For contemporary and industrial styles, exposed steel stringers become architectural features. A blackened steel mono stringer supporting floating wood treads creates dramatic impact. Open-cut stringers with a raw or powder-coated finish complement modern mountain aesthetics.
We often fabricate stringers alongside railings and guardrails, ensuring consistent materials and finishes throughout. Our Truckee shop handles projects from simple deck stairs to complex multi-flight interior staircases.
Contact us to discuss your project and we’ll fabricate stringers that give your staircase the foundation it deserves.
Frequently Asked Questions
Steel stringers are ideal for longer spans, wider staircases, exterior applications exposed to weather, designs featuring exposed structural elements, and any situation where you want to eliminate flex and ensure long-term dimensional stability. They’re also necessary for supporting heavier tread materials like stone or concrete.
Steel stringers are typically heavier than wood and may require appropriate structural connections at the top and bottom bearing points. We design attachment details into the fabrication and coordinate with your builder to ensure proper installation. For most residential projects, installation is straightforward with standard tools and hardware.
Yes. We fabricate stringers to accommodate wood, metal, glass, tile, stone, and concrete treads. The attachment method varies by tread material—some rest on top of open-cut stringers, others bolt through from below, and some require welded brackets. We’ll design the stringer configuration based on your specified tread type.