Will a mattress (80" × 78" × 15.5") fit in a staircase (36" × 68")?

✕ Does not fit — 12.6" too large [why-details] > Why it doesn't fit The item exceeds the opening in every orientation — no rotation or tilt resolves this. Tightest point: Item vs Opening (width axis) Remaining clearance: 12.6" (50%) [/why-details] [maneuver-details] > How to make it work The item exceeds the space in every orientation — standard entry won't work. Consider these alternatives: - Disassemble the item if possible - Check for wider doors or windows - Consider professional movers with pivot techniques [/maneuver-details] [difficulty-details] > Effort required Safety margin: Comfortable Operational expectation: Standard handling — no special equipment or technique needed. [/difficulty-details] [details-below] What we used · Low Confidence Assumptions - Item is rigid and cannot be compressed, bent, or disassembled - No obstructions (light fixtures, handrails, trim, furniture) in the path - Maneuver assumes one person carrying — no grip width accounted for - Stairway handrails protrude a standard distance from the wall - Ceiling height assumed 8ft (2438mm) — not measured - Assumed standard stair width: 36" - Basic width check only — ceiling clearance, tread depth, and turn geometry not analyzed - Complex tilting/pivoting not analyzed - Handrail reduces effective width by ~150mm All orientations tested (1 orientation) | | Orientation | Width | Height | Note | |---|------------|-------|--------|------| | ✓ ← | 394mm (smallest dimension) | — | — | | Step-by-step proof (best: 394mm (smallest dimension)) 1. Width: 0" item > 0" opening → ✗ (0" clearance) Limiting: stair_width at 12.6" *Measure your specific space to confirm — dimensions vary.*