What term describes the amount of upward deflection necessary to counteract the downward deflection in concrete forms?

The term that describes the amount of upward deflection necessary to counteract the downward deflection in concrete forms is camber. Camber is specifically designed into concrete elements to compensate for anticipated deflections due to loads, supporting the structural integrity and aesthetic appearance of the construction. When concrete structures are poured, they naturally tend to deflect downward under load; camber introduces an upward curve to preemptively counter this effect.

This practice ensures that the final construction remains level and performs as intended, as loads are applied over time. Properly incorporating camber into design considerations is crucial for maintaining long-term performance and safety of the structure, particularly in scenarios where uniformity and precision are desired, such as flooring systems and bridges.