A roof truss is a structural framework designed to support the roof of a building. It consists of triangular units that distribute weight evenly, providing stability and strength. Roof trusses are commonly made from wood or metal and are prefabricated for easy installation. These trusses are essential in construction as they allow for larger open spaces within a building without the need for interior support columns. This design is often used in residential homes and commercial buildings, making them a popular choice in modern architecture.