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Structuralaka: horizontal forceaka: lateral load

Lateral Force

In Plain English

Any horizontal force—from wind, earthquakes, or soil pressure—that pushes sideways on a structure.

Definition

A horizontal force acting on a structure caused by wind pressure, earthquake ground motion, soil or hydrostatic pressure, or other horizontal loads. Lateral forces must be resisted by the building's lateral force-resisting system, which may include shear walls, braced frames, or moment frames. Building codes specify minimum lateral force requirements based on location, building height, and occupancy.

Example

The building's lateral force-resisting system must handle a design wind pressure of 30 psf on the windward wall.

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