What does SG mean in ENGINEERING

A structural girder is a horizontal beam that supports vertical loads over long spans, usually made out of steel or reinforced concrete. It is an important element in building bridges and other large structures.

There are eight main types of structural girders available: small girder, secondary girder, segmental girder, semi-fixed girder, socle girder, solid web girder, stiffening girder, and suspension girder. They differ in terms of their strength and load-carrying capabilities.

Structural girders are typically designed using engineering calculations based on standards established by relevant agencies such as American Association of State Highway and Transportation Officials (AASHTO). These calculations include factors like length, spanning capability, support points and loading conditions to ensure safety and maximum performance for the structure.

Most commonly steel and reinforced concrete are used for constructing structural girders. Steel can be hot rolled or cold formed depending on the application whereas reinforced concrete offers greater design flexibility when compared with steel due to its low weight per volume ratio.

Yes, regular inspections should be conducted to check for signs of wear or damage caused by extreme weather conditions or corrosion which could compromise the integrity of the structure. Any necessary repairs should be performed promptly to ensure safety and proper functioning of the bridge or structure built with a structural girder.