Insulation: Some time for the duration of which the duct is exposed to fire until a reduction of material insulation security occurs. Integrity: Time during which the duct is subjected to fire until finally a lack of integrity happens, which include deformation, melting, or collapse. On top of that, for https://andresundsf.azzablog.com/36714594/fire-resistant-ductworth-isntallers-an-overview