Generally, H-shaped steel can be divided into wide-flange H-shaped steel (HW), medium-flange H-shaped steel (HM), narrow-flange H-shaped steel (HN), thin-walled H-shaped steel (HT) and H-shaped steel piles (HU). The expression method of H-shaped steel is height H × width B × web thickness t1 × wing plate thickness t2. For example, H-shaped steel Q235B: SS400 200×200×8×12 means a wide-flange H-shaped steel with a height of 200mm, a width of 200mm, a web thickness of 8mm, and a flange thickness of 12mm, and its grade is Q235B or SS400.

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