Standard geometry
Switch-back stairs
180° turn between flights with a landing in the middle.
- Two parallel runs with mid-landing
- 180° reversal in direction
- Common in apartments and stair towers
- Code-compliant for commercial
- Est. 198739 yrs
- Family-Owned
- Veteran-Owned
- 4.8★ Verified
- Lehigh Valley
Definition
What is a switch-back stair?
A switch-back stair runs two parallel flights in opposite directions joined by a mid-height landing, reversing direction 180 degrees. The compact stacked footprint makes it the standard for apartments, stair towers, and commercial buildings where the run has to fit in a tight vertical shaft.
Built & reviewed by Snyder Stairs · Whitehall, PA · Est. 1987 · Updated June 2026
How it compares
How does a turn-style stair save space?
The trade-off across the turning configurations is footprint versus comfort. A landing is easiest to walk; a winder is the most compact. Here is where each one sits.
| Configuration | Turns on | Footprint | Best for |
|---|---|---|---|
| L-shape | Flat square landing | Largest of the turns | Comfort, code rest point |
| Winder | Pie-shaped treads | Most compact | Tight footprints, basements |
| Switch-back | Mid-landing, 180° | Stacked / vertical | Apartments, stair towers |
| Curved | Custom-radius arc | Open sweep | Formal foyers, statement |
Switch-back stairs FAQs
Common questions about switch-back stairs.
Q: Why are switch-back stairs used in apartments and towers?
The 180-degree reversal stacks the two flights into the smallest possible floor footprint, which is exactly what a multi-story shaft needs. The mid-landing also gives a code-required rest point on tall commercial runs.
Q: Can a switch-back stair be built to commercial code?
Yes — switch-backs are a staple of commercial and multi-family work. We build the rise/run, landing dimensions, and handrail to the adopted commercial code for the jurisdiction the project is permitted in.
Browse every profile we carry.
Two full product catalogs — wood and iron. Flip through the whole line, mark what you like, and bring it to your first call.
Ready when you are
Custom stairs and railings, built in Whitehall.
Custom stairs and railings, built by a family of Pennsylvania craftsmen for nearly forty years. We'll give you a realistic budget on the first call — not a teaser, not a pressure-close. Get in touch, or send a few photos.
Budget on the first call · (610) 443-2240 · Whitehall, PA
