How to Calculate Load Bearing Wall Loads
Floor load: Floor PSF x Tributary width x Wall length
Roof load: Roof PSF x Tributary width x Wall length
Total: (Floor loads x number of floors) + Roof load + Wall self-weight
Header Sizing Guidelines
- Up to 4 ft opening: Double 2x6 or 2x8
- 4-6 ft opening: Double 2x8 or 2x10
- 6-8 ft opening: Double 2x10 or 2x12
- 8+ ft opening: LVL or steel beam required
Disclaimer: Always consult a structural engineer before modifying load-bearing walls.