Cold-formed steel sections are manufactured by:
Choose the correct answer
Melting and casting into moulds at high temperature
Room-temperature pressing or roll-forming of thin steel sheet — shapes produced without heating
Hot rolling at mill (same as structural sections)
Welding plates together
Correct Answer
B. Room-temperature pressing or roll-forming of thin steel sheet — shapes produced without heating
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Cold-formed steel (CFS): formed at room temperature by pressing/rolling/bending thin sheet steel (0.4–6 mm) into shapes (C, Z, hat, angle, hollow). IS 801 / IS 811 govern. Advantages over hot-rolled: thinner walls, lighter, cheaper for light loads. Disadvantages: local buckling (thin walls), corrosion susceptibility. Used for: purlins, wall framing, light industrial buildings.
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