They are a kind of specialized structural parts that are used to reach long distances in the erection of constructions and bridges. Their lightness and high-strength mean they additionally have great load bearing capacity by using materials as little as possible - an efficient building material for large projects. The load exerted on trusses is distributed evenly throughout all of their members. This means that additional load-supporting structures upstream serve only to straighten loads rather than increase bearing area. The way in which they can be taken apart or assembled works to the advantage of any temporary or moveable building. Their module-based design allows for assembly and disassembly with ease, which is a major advantage in temporary or moveable buildings.