Central spine · Mono stringer · Cantilever
Mono stringer and floating staircases, priced online.
Engineered to your state's building code. Designed in Los Angeles and New York, delivered nationwide.
10+
Years building stairs
1000s
Staircases built
LA & NY
studios, shipping nationwide
Calcs + drawings
Included with every order
Our staircases
Three structures. One specialty.
We only build floating staircases: precision-engineered structures that become the centerpiece of any interior. Every staircase is a collaboration with designers, architects, builders and homeowners, from first sketch to delivery.
Central Spine Staircase
One steel spine. Straight, L-shaped or U-shaped.
A single central spine carries every tread and turns at a quarter landing, guiding traffic neatly around a corner. Ideal for hallways and open-plan interiors, finished with glass balustrade.
Mono Stringer Stairs
Mono stringer staircases.
A single structural stringer runs the full flight and supports each tread, so no side walls are required. Mono stringer stairs give you clean sightlines, minimal steel and maximum impact.
Transparent pricing
See your price before you talk to anyone.
Choose your steps, rise, finish, treads and balustrade in the 3D builder, then order online. Or send the design to your architect or builder.
Built for your location
Engineered to the code where you live.
Requirements differ from state to state, so we engineer each staircase for your project's location.
California
California Building Code and seismic requirements, with documentation for local permit offices.
New York
NYC and New York State requirements, with paperwork for building and co-op boards.
Florida & coastal
Wind-load and corrosion considerations, with durable finish and hardware options.
Every other state
Engineered to the IRC/IBC and checked against local amendments for your project.
How it works
From first sketch to delivered stairs.
01
Configure
Build your staircase in 3D and see the price.
02
Verify
We confirm dimensions against your plans or site measurements.
03
Engineer
Calculations and technical drawings for your state's code.
04
Fabricate
CNC precision and hand finishing by skilled woodworkers and engineers.
05
Deliver & install
Delivered nationwide with full documentation. Ask us about installation in your area.
10+ years. Thousands of stairs.
We do one thing, exceptionally well.
Over a decade focused on central spine and mono stringer design and fabrication.
Central Spine Specialists
Floating central spine and mono stringer staircases are all we build, so every detail is refined.
Prices Online, No Waiting
Prices are displayed in the shop. Add to cart and buy today, with no lengthy quote process or sales calls.
Code-Compliant Engineering
Designed to meet building codes, with full documentation, calculations and drawings with every order.
The CELN Workshop
See how custom stairs are built.
Expert Craftsmanship
Skilled woodworkers and engineers combine modern CNC machinery with traditional craftsmanship for flawless results.
The Finest Materials
Quality begins with materials. A CELN staircase is an investment designed to last for generations.
Advanced Engineering
Our staircases are engineered to meet demanding building codes, including California's rigorous standards.
For architects and builders
Specify with confidence.
Working on a project with a design team? Ask us for technical drawings, structural information and trade support.