Commercial fire rated doors with a 120-minute fire rating are specially designed doors that provide up to 2 hours of protection against fire. These doors are constructed with robust materials like galvanized iron sheets and infilled with fire-resistant materials such as honeycomb kraft paper in the shutter and polyurethane foam in the frame to withstand intense heat. They meet fire sa... https://ahlada.com/products/fire-rated-120-mins-commercial-steel-door/