The second of three pieces of the Portland Aerial Tram's intermediate tower was put in place early Thursday. The section was brought by barge up the Willamette River from Thompson Metal Fabricators in Vancouver, Wash., to its new location on the South Waterfront. When finished, the tower will stand 196 feet and weigh more than 560,000 pounds. The city of Portland and contractor Kiewit Pacific Co. are coordinating the construction of the intermediate tower. Thomson Metal Fabricators and Carr Construction also were on site for the installation.