Structural steel beams are rolled while they are in which state?

The rolling of structural steel beams occurs while the steel is in a hot state. This is because heating the steel to a high temperature increases its malleability, allowing it to be shaped and formed more easily into the desired dimensions and profiles. The hot rolling process also improves the physical properties of the steel, such as its strength and ductility, making it ideal for construction applications. When steel is hot, it can be rolled into various shapes, including I-beams and other structural forms, without cracking or compromising its integrity.

Cold rolling, on the other hand, is typically used for producing thinner sheets and shapes from steel that has already been processed, rather than for creating large structural members like beams. Processing at room temperature or using techniques involving frozen materials would not provide the necessary flexibility or deformability required for effective shaping of structural steel. Therefore, hot rolling is essential for achieving the required specifications and strength in structural steel beams.