What are beams fabricated using rolled plates called?

Explanation:

1. Plate girders are beams fabricated using rolled plates that are welded or bolted together to form a beam.
2. These girders are often used in large structures like bridges or buildings where the span is long and the loads are significant.
3. The plates used in the fabrication of plate girders are usually made of steel and are shaped to form the web and flanges of the girder.

 Additional Information

1. Castellated beams: These are beams that are created by cutting a regular beam (usually an I-beam) in a pattern and then reassembling it to form a beam with an enlarged web, which helps reduce weight and increase the depth of the beam for larger spans.

2. Hybrid beams: Hybrid beams combine two or more materials, such as steel and concrete, to take advantage of the benefits of both materials.

3. Composite beams: These beams combine two materials, typically steel and concrete, where the concrete works in compression and the steel works in tension, offering better load distribution and efficiency.