We are offering I beam. Steel material :q195-q235. Astm a36, ss400.ect standard: gb , jis , bs , astm, din. size: meet standard size or as buyer's request . place of origin: china length: 5.8m, 6m, 8m, 9m, 12m. dimensions: 100mm-560mm specification table please check below: 14 140*80*5.5mm16 160*88*6.0mm18 180*94*6.5mm20a 200*100*7.0mm20b 200*102*9.0mm22a 220*110*7.5mm22b 220*112*9.5mm25a 250*116*8.0mm25b 250*118*10mm36a 360*136*10mm36b 360*138*12mm36c 360*140*14mm40a 400*142*10.5mm40b 400*144*12.5mm40c 400*146*14.5mm45a 450*150*11.5mm45b 450*152*13.5mm45c 450*154*15.5mm56a 560*166*12.5mm56b 560*168*14.5mmthe I beam is our advantage , annual sales volume over 30000mt, what's more, many regular customers are purchasing from us. Othersiwe, we also can manufacture you all the size you requested. Your satisfaction is our greatest pursuit. welcome to enquire.