A girder is a long, thick piece of steel or iron that is used in the framework of buildings and bridges. a strong beam, made of iron or steel, that supports a floor, roof, or bridge (gird). In building construction, a large main supporting beam, commonly of steel or reinforced concrete, that carries a heavy transverse (crosswise) load. In a floor system, beams and joists transfer their loads to the girders, which in turn frame into the columns
A beam of steel or wood used to support not only the roof but the entire wall section in transit, locating in the ceiling module line of a unit This member may be supported by posts or columns if necessary
a flexural member that is the main or primary support for the structure, which usually receives loads from floor beams and stringers A girder can be any large beam, especially if built up
a flexural member which is the main or primary support for the structure, and which usually receives loads from floor beams and stringers; any large beam, especially if built up