Steel worker and contractor. Founding member of Local 46 of the International Association of Bridge and Structural Iron Workers. Local Union 46 includes correspondence, reports, financial records, workmen time books, day books, membership ledgers documenting routine union business, the Chicago Lockout of 1921, and Illinois Governor Len Small, the local's involvement in the Springfield School Districts 1921 elections ans specifications for the Elk's Club building. Also includes personal papers and letters regarding the Jennings Ford Dealership in Springfield, and Sears and Roebuck Company and 81 blueprints recording steel and structural work for buildings in Springfield and other communities. Also photographs concerning Weinhoeft, the construction of bridges in Montana, Arkansas and Iowa, and Lanphier and Springfield High Schools. Also a history of Weinhoeft Family, 1997. The Henry Weinhoeft Blueprints were originally part of this collection. They are shelved separately as MC11/1.