Stair type fit check
What Fits Up Circular Stairs?
27 in usable width, 80 in headroom. Circular stairs curve around an open well and need conservative fit checks for long rigid items.
curvedcomplex navigation
Typical Stair Measurements
Clear width
30"
Effective width
27"
Tread depth
10"
Riser height
7"
Headroom
80"
Diameter
84"
These are planning defaults. Measure your real stairway before buying, moving, or booking delivery.
Fit Notes
- Open-well circular stairs are easier than center-pole spirals but still lack a flat turn.
- Effective width changes along the arc.
- Long items need clearance through a continuous sweep.
What Fits?
3-seat couch
Often works if carried upright and the landing has enough pivot space.
Queen mattress
Usually clears on edge because thickness is the limiting dimension.
Bookshelf
Only if carried upright and kept to the outside radius.
Upright piano
Weight, balance, and landing turns usually require professional movers or another route.
Check Your Specific Item
Enter your item dimensions and staircase details to test the exact width, turn, landing, and headroom constraints.
Open Stair Fit Calculator
