1.Product name: U beam steel 2.Size:50-300mm 3.Standards: GB,JIS,EN,ASTM 4.Length:6-12m ... client's requests. Length: 6meter, 9meter, 12meterChinese standard size: 50*37*4.5mm -320*88*8mm Japanese standard size ... : 50*25*3mm-300*90*13mm American standard size:102*40*3.2-305*80*13mm Channel ... (mm) d(mm) Theoretic Weight50253.00~5.002.37~3.46 kg/m75403.85.30 kg/m754045.60 kg/m75404 ...