What Is a Load-Bearing Wall?
A load-bearing wall supports structural loads from above — floors, roof, or other walls — and transfers them to the foundation. Identifying them correctly is critical before any remodel that involves wall removal.
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How to identify one
Load-bearing walls typically run perpendicular to floor joists or roof rafters, are positioned over beams or foundation walls below, and are often (but not always) interior walls near the center of the building. Exterior walls are almost always load-bearing. But visual identification alone is unreliable — you need the structural drawings or an engineer's assessment.
What happens if you remove one
Removing a load-bearing wall without proper support causes sagging floors, cracked drywall, and in worst cases, partial structural collapse. The loads don't disappear — they need an alternate path through a beam, header, or new structural element designed by an engineer.
The engineering process
The engineer calculates the loads on the wall, designs a replacement beam (LVL, steel, or glulam depending on span and load), specifies support posts and their footings, and details the connections. The building department requires these drawings for the permit. This is not a contractor judgment call.
The bottom line
Load-bearing walls carry structural loads to the foundation. Never remove one without an engineer's beam design and permit.
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