Load-Bearing Wall
A wall that carries structural weight from the roof or upper floors down to the foundation.
A load-bearing wall is part of a building's structural skeleton. It transfers weight from above—roof rafters, floor joists, or upper-story walls—through the wall framing and into the foundation below. Removing or altering a load-bearing wall without proper engineering can cause sagging ceilings, cracked drywall, or in severe cases, structural collapse.
Identifying load-bearing walls requires inspecting the direction of floor joists (walls perpendicular to joists are usually load-bearing), the location of the wall relative to the foundation and ridge beam, and any beams or posts directly above or below the wall. In balloon-frame or platform-frame construction the rules differ, so a structural engineer should always confirm before demolition.
When a load-bearing wall is removed, a properly sized header or beam must be installed to carry the transferred load, supported by posts and footings sized for the span and weight.
Real-World Example
The contractor hired a structural engineer before opening the wall between the kitchen and dining room—it turned out to be load-bearing, requiring a $2,400 LVL beam.