What standard is channel steel 250*90*9?
Channel 250*90*9 is class B, channel 25, GB/707-1988.
Channel 250*90*9 is class B, channel 25, GB/707-1988
Channel steel: the channel steel is a long strip steel with a cross section. Its specification means: such as 120*53*5, which means that the waist height is 120 millimeters, the width of the leg is 53 millimeters of channel, the waist is 5 mm thick channel, or called 12# channel steel. The same height of the channel, if there are several different leg width and waist thickness, also need to add a, B, C on the right side of the model to distinguish, such as 25a#, 25b#, 25c# and so on.
