materialswide flange beams equal to or greater than 150 kg per meter: ASTM A6 shapes conforming to ASTM A 992 or ASTM A 572,Grade 50, or BSI universail bean shapes confoming to ASTM S 992, or JIS G and vietnam standardr, S355JR.Wide flange beams less to than 150 kg per meter:
đang được dịch, vui lòng đợi..