Claim: The diameter of the James Bruce Round Barn measures 58 feet 8 inches and was designed by the team of Jeremiah Shaffer and the Haas Brothers.
Evidence: The diameter of the James Bruce Round Barn is 58 feet 8 inches (about 17.7 m). The barn was designed by the team of Jeremiah Shaffer and the Haas Brothers, Shaffer's five brothers-in-law.