Calculadora de Luz de Viguetas de Piso — ft, in a tamaño de vigueta
Cómo usar esta calculadora
Ingrese la distancia de luz libre entre apoyos, seleccione espaciado de viguetas (12", 16" o 24" a centros), especie de madera y condiciones de carga. La calculadora determina el tamaño mínimo de vigueta necesario y muestra las luces máximas admisibles para todos los tamaños comunes.
Carga viva: 40 psf para áreas habitables, 30 psf para dormitorios, 20 psf para áticos. Carga muerta: 10 psf típico, 20 psf para pisos con losa. Deflexión: L/360 para carga viva, L/240 para carga total.
| Tamaño de Vigueta | Actual (in) | Luz Máxima | Flexión | Status |
|---|
Cálculos Guardados
| Time | Span | Espaciado | Especie | Load | Recommended | Status |
|---|
How to Size Floor Joists
This vigueta de piso span calculator determines the minimum joist size for a given clear span based on the IRC (International Residential Code) Table R502.3.1. Enter the distance between supports, joist spacing, wood species and grade, and live/dead loads to find the correct joist dimension.
Span Calculation Method
Maximum allowable spans are derived from bending stress (Fb) and modulus of elasticity (E) for each species/grade combination. La calculadora checks both bending capacity and L/360 deflection under live load. The more restrictive limit governs. Actual lumber dimensions are used (e.g., 2×10 = 1.5" × 9.25").
Common Floor Loads (IRC)
Living areas: 40 psf live + 10-20 psf dead. Sleeping rooms: 30 psf live. Decks/balconies: 40-60 psf live. Dead load includes subfloor (2-4 psf), ceiling below (5-8 psf), and mechanical/finishes. Always verify with local building codes — some jurisdictions amend IRC tables.
Límites de Flexión
IRC requires L/360 for live load deflection and L/240 for total load deflection. This means for a 14-foot span, maximum live load deflection is 14×12/360 = 0.467 inches. Stiffer viguetas improve floor feel and reduce bounce.
