A skysraper support is composed of several components, including a GIRDER (6 letters), BEAM (4 letters), ibar (4 letters) and ibeam (5 letters). A GIRDER is a large, horizontal BEAM that supports the weight of the building. A BEAM is a long, straight piece of wood or metal that is used to support a structure. An ibar is a steel BEAM with an I-shaped cross section, which is used to support the floors and walls of a skyscraper. An ibeam is a steel BEAM with an I-shaped cross section, but it is much larger than an ibar and is used to support the entire weight of the skyscraper.