👉 Underbeam is a structural element that is used to reduce the amount of beam material required for a given span. It can be defined as the portion of the beam that lies below the neutral axis, which is the line joining the ends of two adjacent spans. Underbeams are often used in bridges and other structures where the beam is not designed to support the full weight of the structure. Underbeam elements are commonly made of steel or aluminum, with a thickness ranging from 0.5 to
