Beam Calculator — Estimate Beam Size, Weight & Load Capacity

Beam Calculator — Estimate Beam Size, Weight & Load Capacity

Calculate structural beam sizing, weight, and load-bearing capacity for floor beams, header beams, and ridge beams.

🏗️ Beam Calculator

Board Feet
--
Approx Weight (lbs)
--
Est. Cost ($1.10/bf)
--

💡 Pro Tip

For any beam supporting a roof, floor, or carrying significant live loads, always consult a licensed structural engineer. Beam sizing calculations must account for species, grade, span, and tributary width.

Frequently Asked Questions

Q: How do I size a structural beam?

A general rule for floor beams: beam depth (inches) = span (feet) ÷ 1.5. For a 12-foot span: 12÷1.5 = 8-inch deep beam. Always verify with a structural engineer for load-bearing applications.

Q: How much weight can a 2x10 beam support?

A single 2x10 spanning 10 feet can support approximately 1,700–2,000 lbs. Doubling or tripling the members (2-ply or 3-ply beam) doubles or triples the capacity proportionally.

Comments