High quality logs used in two ways The first use is in a round or flat faced form to support a deck such as in a bridge or wharf The second use is as large end section, heart free, sawn timber suitable for heavy construction Girders for the first use need to be of a durable or treatable species, straight, defect free and have a small end diameter of between 30 and 40 cms depending on the order Girders for the second use generally have similar specifications but need to be larger in diameter (often up to 60 cms) at the small end They can carry a little centre defect depending on the diameter and timber sizes required to be cut
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