Collar tie: A collar tie is a board that generates a horizontal line between two rafters. It may be structural but also could frame a ceiling. [twelve] The last element being manufactured was the central nave, from 1420. By that point, nevertheless, the age of the great cathedrals had come https://roofing-company-in-dekalb86420.wiki-cms.com/6993559/not_known_details_about_roofing_company_in_dekalb_il