Fire Doors & Fire-Rated Door Assemblies

Fire-rated doors with asbestos-containing cores were a documented building-product category installed extensively in commercial buildings, schools, hospitals, government buildings, and industrial facilities throughout the mid-twentieth century. Common product lines documented in asbestos litigation records include Underwriters Laboratories–labeled fire doors with B, C, D, and E ratings; honeycomb-core fire doors; and solid-core composite door assemblies. Workers documented as potentially exposed include door manufacturers, building installers, commercial maintenance crews, and demolition and renovation contractors who cut, fit, or removed labeled fire doors.