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Home / Stair Guides

Spiral Stairs

Circular spiral around center pole, space-saving design

Trusted across thousands of fit checks · updated daily
400 questions answered

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Quick answer

Can I move furniture up spiral stairs?

Large furniture may not fit; consider professional assessment. Spiral Stairs have a minimum clearance of 25 inches. The undefined° turn may limit large items.

Moving Difficulty: Difficult

Standard Dimensions

Standard spiral stairs dimensions (in)
DimensionMeasurement
Width60"
Minimum Clearance (critical)25"
Headroom78"
Total Rise114"
Tread Depth7.5"
Riser Height9.5"
Number of Risers12
Standard stair dimensions aren't the whole story — check whether your exact item clears this staircase, including the turn and headroom.Check stair fit →

Turn Configuration

undefined° continuous spiral turn — no reorientation possible, so furniture must maintain its angle. Critical clearance at the turn: 25".

Building Code Compliance

  • IRC Residential: Compliant
  • IBC Commercial: Not compliant
  • ADA Accessible: Not compliant

Moving Tips for Spiral Stairs

  • Measure your furniture and the stair clearance before moving
  • Remove doors at top and bottom of stairs for extra clearance
  • Use furniture sliders or moving blankets to protect walls
  • Have at least 2 people for heavy items
  • Only items smaller than the effective width will fit
  • Consider external hoisting for large items
  • Professional movers may refuse spiral stair moves

Measure smart

What to measure.

Four numbers decide nearly every fit check. Get these right and the rest follows.

  1. 01Minimum clearance — the narrowest point along the entire flight
  2. 02Stair width between walls or railings
  3. 03Headroom and the diagonal at any turn or landing
  4. 04Your furniture's smallest dimension in every orientation

Don't make these

Common mistakes.

Most “it didn't fit” stories trace back to one of these oversights.

  1. ⚠Measuring the step width but missing a tighter pinch at a turn or overhang
  2. ⚠Forgetting headroom — a low ceiling or soffit can stop a tall item
  3. ⚠Assuming a landing lets you reorient when a winder turn does not
  4. ⚠Underestimating how much a handrail narrows the usable width

Go deeper

Related guides & calculators

More Stair Guides

  • Circular StairsGuide
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  • Straight StairsGuide
  • L-Shaped StairsGuide
  • U-Shaped StairsGuide
  • Quarter Winder StairsGuide
  • Half Winder StairsGuide
  • Floating StairsGuide
  • Cantilevered StairsGuide
  • Butterfly StairsGuide
  • Imperial StairsGuide
  • Geometric StairsGuide
  • Alternating Tread StairsGuide
  • Ship Ladder StairsGuide
  • Split Level StairsGuide
  • Fire Escape StairsGuide
  • Folding StairsGuide
  • Retractable StairsGuide
  • Scissor StairsGuide

Calculators & related

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Frequently asked

Questions we keep getting.

  • What are the standard dimensions of Spiral Stairs?

    Standard spiral stairs have a width of 60 inches, tread depth of 7.5 inches, and riser height of 9.5 inches. The total rise is 114 inches with 12 risers.

    01
  • Can a sofa fit up spiral stairs?

    It depends on the sofa dimensions. Spiral Stairs with 25" clearance may accommodate smaller sofas (under 72" wide), but larger sectionals typically won't fit.

    02
  • What is the minimum clearance for moving furniture up spiral stairs?

    The minimum clearance on spiral stairs is 25 inches. This is the narrowest point furniture must pass through. For safe passage, furniture's smallest dimension should be at least 2-3 inches less than this clearance.

    03
  • Can any large furniture fit up spiral stairs?

    Spiral stairs have the most restrictions due to continuous turning and narrow width (25" effective clearance). Only items smaller than 25" in all dimensions typically fit. Consider disassembling furniture or using exterior lifting.

    04

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