Removing a Load-Bearing Wall: LVL Beam Sizing and Temporary Shoring Rules
You cannot knock down an interior wall until you determine whether it is load-bearing. If a wall supports ceiling joists, roof rafters, a second floor, or roof trusses, removing it requires installing an engineered structural beam.
Multi-ply Laminated Veneer Lumber (LVL) or steel I-beams transfer weight to solid jack and king studs down to the foundation. Before touching existing wall studs, full-height temporary shoring walls must be constructed on both sides to carry live and dead loads.
Identifying Load-Bearing Framing
Key structural indicators include joists running perpendicular to and overlapping above the wall, concentrated truss point loads, and interior walls stacked directly above crawlspace girders.
Sizing, Shoring, and Point Loads
Engineered beam installation requires strict adherence to building physics:
- Beam Engineering: Beams are sized using manufacturer engineering calculations (Weyerhaeuser ForteWEB) to meet maximum deflection limits (L/360 or L/480 live load deflection).
- Temporary Shoring: Built with 2x4 or 2x6 studs at 16 inches on center, wedged tight to ceiling joists. Crawlspace shoring is installed directly beneath lower floor framing.
- Flush Beam vs Drop Beam: Drop beams hang below drywall headers; flush beams recess joists into concealed hangers for flat room-to-room ceilings.
- Point Load Path: Jack studs must transfer load through solid floor blocking down to crawlspace piers and poured concrete footings (NCRC Section R502.6).
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