Browse Proptionary encyclopedia

Build your real estate vocabulary to be able to communicate and invest more effectively and professionally.



Horizontal support beam used to strengthen the structure.


The purpose of the girder is to absorb the heavy loads of buildings or other structures such as a bridge or road. In many ways, a girder has the same function as a very large beam. It absorbs heavy weight loads by placing the loads onto the most structurally sound portion of a building. There are various types and shapes of girders, the most common being an I or T shape girder.

Girders typically consist of an I-beam that conjoins with a double loaded bearing flange. This is divided by a stabilizing web which most often is utilized in order for there to be support for the construction of bridges.

Compared with other major Girders

Box Girder- A beam consisting of a rectangular cross section that has more than one component.

Plate Girder– A beam convened from plates made of metal or steel which are locked together in order to maintain and carry the parallel surface of a bridge.

Warren Girder– A truss which is composed of both lower as well as upper members conjoined with members that adapt in a structural chain of Isosceles triangles.