Removing an interior load-bearing partition to create an open-concept living space requires precise tributary area load calculations, temporary shoring walls, and engineered beam sizing.
1. Calculating Tributary Floor & Roof Loads
Tributary Area Formulation
Total Design Load (PLF) = [Floor Dead Load (10 PSF) + Floor Live Load (30-40 PSF) + Ceiling Dead Load (10 PSF) + Roof Snow/Live Load (20-50 PSF)] x Tributary Width (ft). Always transfer concentrated point loads at beam bearing points through solid blocking down to foundation footings.
| Span Length | Engineered LVL Option (2.0E) | Steel W-Shape Beam Option | Bearing Jack Studs Required |
|---|---|---|---|
| 12 Feet Span | (2) 1-3/4" x 11-7/8" LVL | W6 x 15 Wide Flange Steel | 2 Jack Studs (3" bearing each end) |
| 16 Feet Span | (3) 1-3/4" x 14" LVL | W8 x 18 Wide Flange Steel | 3 Jack Studs (4.5" bearing each end) |
| 20 Feet Span | (3) 1-3/4" x 16" or (4) 14" LVL | W10 x 26 Wide Flange Steel | Steel Lally Column (3.5" OD Schedule 40) |