Rolta India's consortium Stone & Webster Rolta (SWRL) has bagged an engineering services contract for the 5th gas-cracking furnace at Reliance's IPCL Gandhar Petrochemical complex at Gujarat.According to a release issued by Rolta India to the BSE, the furnace will be an expansion of the existing four Stone & Webster USC-24W cracking furnaces and will increase the installed capacity at Gandhar to 400 KTA Ethylene.The project has already begun and mechanical completion is planned in early 2006, the release said.