Sorry folks - to my knowledge, the Saipem 7000 is the world's largest crane, with twin, 7000t lifts:http://www.saipem.eni.it/module.asp?sect=flotta&pag=saipem7000 Abusive comment hidden. (Show it anyway.)
http://www.saipem.eni.it/module.asp?sect=flotta&pag=saipem7000