When it comes to stair construction, one component serves as the unsung hero of every safe, durable staircase—the stair stringer. Whether you’re a builder working on a commercial project or a homeowner planning a renovation, understanding stair stringers is essential to creating stairs that are both functional and beautiful.
What Is a Stair Stringer?
A stair stringer is the structural support that holds the treads and risers of a stairway in place. Running along each side or through the center of the staircase, stringers form the backbone of the entire structure, anchoring each step and ensuring the stairway functions safely and reliably.
We fabricate stringers from materials including wood and aluminum, selecting the right material based on your project’s specific setting, design requirements, and environmental conditions. Properly installed stringer systems are critical for meeting building code requirements and ensuring user safety in both residential and commercial applications.
Types of Stair Stringers We Offer
Choosing the right stringer system is crucial for both structural integrity and aesthetic appeal. Here are the main types of stair stringers we specialize in:
1. Cutout Construction Grade Stringers
These traditional stringers run diagonally along the sides of your staircase, featuring a distinctive notched, zigzag pattern that supports the treads and risers. Construction grade stringers conceal the edges of steps, creating a clean, classic appearance that’s perfect for finished staircases.
Best for: Residential interiors and projects requiring a traditional look. These stairs are overlay-ready for hardwood veneer, laminate flooring, carpet, or vinyl.
Important note: Commercial stair construction typically requires different rise and run specifications than residential projects. Our team ensures your stringers meet the appropriate code requirements for your specific application.
2. Mono Stringers
Mono stringers feature a bold, contemporary design with a single central support beam running up the middle of the staircase. We fabricate these from powder-coated aluminum, which offers several distinct advantages:
• Straighter and less prone to bending than other metals
• Resistant to rust and internal stresses that can develop in steel over time
• Significantly lighter weight, reducing structural load on the building
• Creates a dramatic architectural statement
Mono stringer stairs become true focal points when paired with thoughtfully selected railing systems. Whether you choose glass for maximum transparency, welded metal for industrial strength, or wood-capped rails for natural warmth, these systems deliver striking visual impact while maintaining structural excellence.
3. Housed/Dual Stringer Systems
This versatile design places stringers on either side of the stairs, offering robust support for both traditional and modern aesthetics. Dual stringers allow for creative flexibility in railing and tread design, with the option for open or closed risers.
Ideal for: Open-rise configurations and spaces with one or more open walls. These systems create an airy, architectural focal point and pair beautifully with glass, cable, metal, or wood railing systems, offering virtually endless customization possibilities.
Common Mistakes to Avoid
Even experienced builders can encounter issues with stair stringer installation. Here are the most critical mistakes to watch for:
• Improper floor-to-floor measurements that disrupt the rise/run ratio, leading to code compliance issues and costly rebuilds
• Using incorrect brackets or fasteners that compromise structural support and stability, causing project delays and safety hazards
• Failing to account for deflection or movement, particularly in outdoor installations or minimalist modern designs with long, unsupported spans
• Not maintaining protective coatings or selecting inappropriate finishes for site conditions
• Skipping code requirements, which can result in serious liabilities or safety violations
Our Installation Process
Stair stringer installation can range from setting a fully welded stair frame using heavy machinery to carefully assembling components onsite. Regardless of the approach, successful installation requires meticulous attention to detail, thorough planning, and the flexibility to adapt when site conditions change.
Why Choose Us for Your Stair (and Stringer) Project?
We understand that every exceptional staircase starts with a solid foundation—and that foundation begins with expertly crafted and properly installed stair stringer systems. Whether you’re building new stairs or upgrading existing stair framing, our experienced team is here to guide you through every step.
From initial measurement through engineering and final installation, we focus on what matters most: precision, durability, and safety. We work closely with clients during planning and design to keep projects on track and eliminate costly surprises. Whether your project is residential or commercial, we’re committed to building stair systems that are safe, code-compliant, and built to stand the test of time.
Ready to Get Started?
Browse our project gallery to see examples of our mono stringer, housed/dual stringer, and cutout construction grade cutout stairs in action. Once you’ve selected your ideal stringer system, let’s discuss railing options to complete your vision.
Contact us today to discuss your stair project and discover how the right stringer system can transform your space.
