Frederick “Fritz” Rudolph Sr., cofounder and former president and chairman of Walbridge, Ohio, building contractor The Rudolph/Libbe Cos. Inc., died on Jan. 11. He was 79. The firm, founded in 1955 with Rudolph’s brother and cousin, reported $321 million in 2007 revenue. He retired in 2004 and was president of Associated General Contractors of Ohio.