What term describes the slight convex curvature built into a beam to counteract sagging under load?

What term describes the slight convex curvature built into a beam to counteract sagging under load?

• A. Camber
• B. Arch
• C. Buckle
• D. Strain

Answer: (A)

The main idea is to build in an upward bend, so the beam starts with a slight camber. This intentional curvature counteracts the downward sag that occurs when the beam carries weight. By adding a gentle arching shape during fabrication, the beam’s deflection under load brings it closer to level, rather than leaving it to sag too far. This term is different from an arch, which is a curved structural form carrying loads primarily in compression along its curve. It also differs from buckling, which is a dangerous instability under compression, and from strain, which is a measure of how much a material deforms. Camber is a deliberate feature to improve serviceability by offsetting expected deflection.

The main idea is to build in an upward bend, so the beam starts with a slight camber. This intentional curvature counteracts the downward sag that occurs when the beam carries weight. By adding a gentle arching shape during fabrication, the beam’s deflection under load brings it closer to level, rather than leaving it to sag too far.

This term is different from an arch, which is a curved structural form carrying loads primarily in compression along its curve. It also differs from buckling, which is a dangerous instability under compression, and from strain, which is a measure of how much a material deforms. Camber is a deliberate feature to improve serviceability by offsetting expected deflection.