The national standard for channel steel thickness tolerance is ±0.06t.
1. Section size and allowable deviation:
1. The height h, leg width b, and waist thickness d of the channel steel are allowable deviations.
2. The allowable deviation of channel steel thickness is ±0.06t.
3. The bending height of channel steel should not exceed 0.15d.
4. The slope of the outer edge of the channel steel legs is not more than 1.5%b for one leg and not more than 2.5%b for both legs.
5. Passivation of channel steel leg ends and shoulders shall not allow a round bar with a diameter equal to 0.18t to pass through
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