Under Hung Crane

Bridge crane hanging from beams, rather than supported on beams.

UL Rating

Underwriters Laboratories certification rating for reliability and quality.

Uniform Load

Load that covers all or part of a beam or surface where, throughout the portion covered, the intensity of load per unit of length or area is the same.

Uplift

Wind load on a building, which causes a load in the upward direction. See also Suction.