Supply Tianjin channel, the melanocortin channel businesses where there? 18,622,303,953 I supply channel brand variety, channel steel specifications Jiangtian channel wide variety for everyone to choose the channel. The channel is a universal section steel material, widely useful. Mainly used in steel structure aspects, such as bridges, steel racks do beams, columns, braces (pole) and so the main features in one direction good bending performance, but weak in another direction. If two channel steel buckle side welding, alternative to the square tube structure if the two channel back-to-back welding use alternative to the I-beam or H-beam light channel with ordinary channel is the actual weight with the theoretical weight are lighter, geometrical dimensions are also smaller (same height as the other dimensions than ordinary channel thin) channel is a section of the groove-shaped long steel. Its specifications to waist high (h) * leg width (b) * waist thickness (d) mm, such as 120 * 53 * 5, the height of 120 mm waist, legs wide, 53 mm.