What do you mean by channel 8 A?
8# refers to the diameter of the channel, (MM) A, I have not heard of, perhaps I am not professional, channel steel used by me
8# refers to the channel width 80mm, the same type of channel is general a, B, a, B is the wing plate channel of different sizes
It is usually said the channel No. 8 No. 8 channel, its height is 80MM, width is 43MM, no A and B channel No. 8 points, only a model, if the other channel with A and B, C, but its width is not the same, but always the same.
