How it Works
Uses standard deflection formulas (e.g., L/360) and material properties. Warning: This is a simplified estimation. Structural integrity depends on multiple factors including load duration, wood species, and lateral support.
What is Beam Load & Span Estimator?
Provides a preliminary check for beam sizing based on span length and load type. It helps determine if a specific beam size (e.g., 2x10 wood or W-beam steel) is adequate for a given opening.
Step-by-Step Guide
- Measure Span – Distance between supports.
- Identify Load – Live load (people) + Dead load (structure).
- Select Material – Wood species or Steel grade.
- Estimate – Check pass/fail against L/360.
Example
Input: 15ft Span, 40psf Load
Result: 2x10 or 2x12 Required
FAQ
What is L/360?
A deflection limit. The beam shouldn't sag more than Length/360 inches under load.
Live vs Dead load?
Dead load is the weight of the structure itself. Live load is people, furniture, snow, etc.
Can I span 20ft with wood?
Usually requires Engineered Lumber (LVL) or trusses, not standard 2x lumber.
Does snow load matter?
Yes, in cold climates, roof loads are significantly higher.
Steel vs Wood?
Steel spans longer distances with less depth but is harder to work with.
👷 Construction Note: Estimates should be verified by a professional contractor. Always add a margin for waste and error.
Conclusion
DANGER: Structural failure can be fatal. This tool provides a rule-of-thumb estimate for planning. Always have your final beam calculations stamped by a licensed structural engineer before construction.