Escalera de Caracol Gratis — Peldaños y Dimensiones (2026)

Cómo Usar Esta Calculadora

1. 1Measure the floor-to-floor height (vertical distance between finished floors).
2. 2Enter the well opening diameter (the circular floor opening for the staircase).
3. 3Enter the total rotation in degrees (360 for one full turn, 720 for two turns).
4. 4Click Calculate for tread count, rise per step, and tread dimensions.

Sobre Este Material

Spiral staircases are space-efficient alternatives to straight stairs, fitting in a circular well opening as small as 44 inches in diameter (though 60 to 66 inches is more comfortable). The IRC Section R311.7.10.1 sets specific requirements for spiral stairs: minimum clear width of 26 inches measured from the center column to the inner edge of the handrail, maximum riser height of 9-1/2 inches, minimum tread depth of 7-1/2 inches at a point 12 inches from the narrow edge, and all treads must be identical. Headroom clearance must be at least 6 feet 6 inches. Spiral stairs are available in steel, aluminum, wood, and composite materials. Pre-fabricated steel spiral stair kits cost $1,500 to $5,000 for standard sizes (42 to 60 inch diameter). Custom-designed spiral staircases in wood or wrought iron range from $5,000 to $20,000 or more. The center column (newel post) is the primary structural element and must be securely anchored to the floor with lag bolts or a base plate. Most spiral stairs rotate clockwise (ascending), which favors right-handed users gripping the outer handrail. In multi-story applications, the center column extends continuously through both floors for maximum structural integrity.

Consejos de Instalación

• •Verify the floor opening is perfectly circular and level before installing the center column.
• •Anchor the center column base plate with at least four 1/2-inch lag bolts into the subfloor and joist.
• •Assemble treads from the bottom up, checking level and rotation angle at each step.
• •Install the handrail continuously from bottom to top — gaps in spiral stair handrails are a safety hazard.
• •Check headroom clearance at every point along the spiral, not just at the entry and exit.

Errores Comunes a Evitar

• ⚠Choosing too small a diameter — 44 inches is the minimum but feels very tight. Choose 60 inches or larger for comfortable daily use.
• ⚠Not verifying the floor opening is actually circular — an oval or irregular opening creates uneven tread spacing.
• ⚠Forgetting to account for the landing platform at the top, which takes the place of one tread in the rotation.
• ⚠Ignoring furniture-moving challenges — spiral stairs cannot accommodate large furniture or appliances.

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