The first segment of Pune's third Metro line, being developed by the Pune Metropolitan Region Development Authority, was erected at Hinjewadi on Friday. The segment weighs 46 tonnes and is erected at a height of 11 metres between proposed station number 01 and 02 on the 23-kilometre elevated Hinjewadi-Shivajinagar line. "Around 10-12 such segments...used between two pillars," an official said.