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Home / Stair Guides

Alternating Tread Stairs

Space-saving steep stairs with alternating step pattern

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

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Quick answer

Can I move furniture up alternating tread?

Most furniture can navigate without special techniques. Alternating Tread have a minimum clearance of 24 inches. The straight path allows diagonal maneuvering.

Moving Difficulty: Easy

Standard Dimensions

Standard alternating tread dimensions (in)
DimensionMeasurement
Width24"
Minimum Clearance (critical)24"
Headroom78"
Total Rise95"
Tread Depth8.5"
Riser Height9.5"
Number of Risers10
Standard stair dimensions aren't the whole story — check whether your exact item clears this staircase, including the turn and headroom.Check stair fit →

Building Code Compliance

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

Moving Tips for Alternating Tread

  • 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

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Frequently asked

Questions we keep getting.

  • What are the standard dimensions of Alternating Tread?

    Standard alternating tread have a width of 24 inches, tread depth of 8.5 inches, and riser height of 9.5 inches. The total rise is 95 inches with 10 risers.

    01
  • Can a sofa fit up alternating tread?

    Yes, most standard sofas (up to 84" wide) can fit up alternating tread with 24" clearance. The key is to tilt the sofa and navigate it diagonally.

    02
  • What is the minimum clearance for moving furniture up alternating tread?

    The minimum clearance on alternating tread is 24 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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