STOUGHTON - STI Holdings, Inc. and its operating subsidiary, Stoughton Trailers, LLC, announced this week it has purchased about 17 acres of land in the city of Brodhead. The land is situated directly across the street from Stoughton Trailers' Brodhead manufacturing plant at 302 23rd St. Stoughton Trailers said it plans to use the land to support its current manufacturing operations in Brodhead. The purchase also provides for potential future expansion.