... be used for steel structure warehouse ,steel structure building and steel structure workshop and so on.Features.1> Bearing bar specification:20×3 to 100×62> ... .5,15,25,30,40,60mm etc. also be according to clients requirement and 30,40,60mm are recommended3> Cross ... be according to clients requirement and 50,100mm are recommended.4> The Maximum length of black panel is 7350mm5> Materials:mild steel ...