Camber is the intentional upward curve built into structural members to counteract deflection under load.

Camber is a deliberate, slight upward curvature introduced into structural elements such as beams, girders, or precast components during fabrication or construction. It is designed to offset expected deflection caused by dead loads, live loads, or long-term creep once the structure is in service.

In construction and structural engineering, camber is commonly used in steel beams, precast concrete members, and long-span framing systems. By pre-shaping the member, engineers ensure that it levels out under load rather than sagging below the intended design elevation. The amount of camber is carefully calculated based on span length, material properties, and anticipated loads.

Proper coordination of camber is essential during design, fabrication, and installation. Excessive or insufficient camber can create alignment issues with adjacent components, finishes, or floor systems. Clear communication between engineers, fabricators, and contractors helps ensure camber performs as intended without causing constructability problems.

Some long-span steel beams can be fabricated with several inches of camber—yet end up perfectly level once the building is fully loaded.