Structural steel sections are designated in IS 808 as:
Choose the correct answer
By weight per metre only
By series name + depth (e.g., ISMB 400), from IS 808 for rolled sections
Only as square hollow sections
By grade: A, B, C, D
Correct Answer
B. By series name + depth (e.g., ISMB 400), from IS 808 for rolled sections
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IS 808: Dimensions for hot-rolled steel beam, column, channel, and angle sections. Designation examples: ISMB 400 (Indian Standard Medium weight Beam, 400 mm depth), ISHB 300 (IS Heavy Beam), ISMC 300 (IS Medium Channel), ISA 100×75×8 (Angle 100 mm × 75 mm × 8 mm thick). IS 2062 gives material specs (yield stress, tensile strength, ductility).
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