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Home / Stair Guides

Helical Stairs

Continuous curve without center pole, free-standing design

Trusted across thousands of fit checks · updated daily
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Quick answer

Can I move furniture up helical stairs?

Large furniture may not fit; consider professional assessment. Helical Stairs have a minimum clearance of 32 inches. The undefined° turn may limit large items.

Moving Difficulty: Difficult

Standard Dimensions

Standard helical stairs dimensions (in)
DimensionMeasurement
Width84"
Minimum Clearance (critical)32"
Headroom80"
Total Rise105"
Tread Depth10"
Riser Height7.5"
Number of Risers14
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 helix turn — no reorientation possible, so furniture must maintain its angle. Critical clearance at the turn: 32".

Building Code Compliance

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

Moving Tips for Helical 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

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

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  • 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

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Frequently asked

Questions we keep getting.

  • What are the standard dimensions of Helical Stairs?

    Standard helical stairs have a width of 84 inches, tread depth of 10 inches, and riser height of 7.5 inches. The total rise is 105 inches with 14 risers.

    01
  • Can a sofa fit up helical stairs?

    It depends on the sofa dimensions. Helical Stairs with 32" 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 helical stairs?

    The minimum clearance on helical stairs is 32 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

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