Building material U beam steel channel steel 1) Size:as below 2) ... A36, SS400.ect4. Standard: GB , JIS ,BS , ASTM, DIN.5. Size: meet Standard size or as buyer's request .6 ... . Length: 5.8M, 6M, 8M, 9M, 12M.7. Packing: with bundles ... , doors and windows, railway and traffice systom , vehchile ,machineExcept U channel, we also deal with Angle steel bar, H and ...