how far can you span a 2×10

The maximum span for a 2×10 beam depends on several factors, including:

1. Load: The weight and type of load the beam will be supporting (e.g., dead load, live load, snow load).
2. Grade: The type and quality of the lumber (e.g., #2, #1, or select structural).
3. Orientation: Whether the beam is installed horizontally (e.g., as a floor joist) or vertically (e.g., as a column).
4. Support: The type and spacing of supports (e.g., posts, footings).

Here are some general guidelines for maximum spans for 2×10 beams:

Horizontal Spans (e.g., floor joists)

• For a #2 grade 2×10 beam, the maximum span is typically:

  • 19 feet 6 inches for a 30 psf (pounds per square foot) live load and 10 psf dead load.
  • 17 feet 6 inches for a 40 psf live load and 10 psf dead load.

• For a #1 grade 2×10 beam, the maximum span is typically:

  • 22 feet 6 inches for a 30 psf live load and 10 psf dead load.
  • 20 feet 6 inches for a 40 psf live load and 10 psf dead load.

Vertical Spans (e.g., columns)

• For a #2 grade 2×10 beam, the maximum span is typically:

  • 14 feet 6 inches for a 2,000-pound axial load.
  • 12 feet 6 inches for a 3,000-pound axial load.

• For a #1 grade 2×10 beam, the maximum span is typically:

  • 17 feet 6 inches for a 2,000-pound axial load.
  • 15 feet 6 inches for a 3,000-pound axial load.

Please note that these are general guidelines and may not apply to your specific situation. It’s always best to consult with a structural engineer or a qualified building professional to determine the maximum span for a 2×10 beam in your specific application. They can assess the loads, materials, and other factors to provide a more accurate and safe design.