Stair type overview
Butterfly Stairs
48 in usable width, 80 in headroom. Butterfly stairs split from a shared landing into two flights, often giving wider clearance than ordinary stairs.
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Typical Stair Measurements
Clear width
48"
Tread depth
11"
Riser height
7"
Headroom
80"
Landing
60"
Turn
180 deg
These are planning defaults. Measure your real stairway before buying, moving, or booking delivery.
Fit Notes
- The 48 inch width is helpful for large furniture, but railings and newel posts still pinch the route.
- The shared landing is the key pivot point.
- Choose the wider branch when the two flights are not symmetrical.
What Fits?
Large sectional piece
Often possible if carried upright through the shared landing.
King mattress
Usually clears on edge when the landing is open.
Folded treadmill
Remove console parts when possible and check landing swing clearance.
Upright piano
May be possible with professional movers and protected turns.
Check Your Specific Item
Enter your item dimensions and staircase details to test the exact width, turn, landing, and headroom constraints.
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