In a move to diversify its business, Indiana-based transportation equipment manufacturer Wabash National Corp. has purchased assets from Portland, Ore.-based aluminum tank maker Beall Corp. for $15 million. The acquisition is expected to close in the first quarter. The assets, which were auctioned off as part of Beall's bankruptcy proceedings, include equipment, inventory, product designs and a manufacturing facility in Portland. The acquisition includes Beall's 406 P...