If you have an unfinished garage, you can use the 2-by-4s in the wall frames as the columns, almost like you'd use 2-by-4s for building DIY shelves. Otherwise, you can secure 2-by-4s to the studs ...

The building is a one-story, wood-frame garage with a loft for offices in one corner. The garage has a concrete floor with radiant heat and a metal roof on the same site on the Peru Center Road ...