Call us at (703) 972-1947 or contact us online today to get started. Every city will have its own unique building codes for fire safety. UL Classified with an FR-S Rating for flame spread and smoke development values of 25 or less. Quick buy. Each type of fire-rated plywood will have a smoke rating, an ESR notice, and a state of conformance to development standards associated with it. There are 20 types of plywood, and not all of them are fire-rated. It is also designed to form a layer of protective char that insulates the wood against deeper damage. Fire Doors with Glass - Direct Doors , w/ 1 layer 3/4" wood planking, 3/4" T&G wood, span 15', live load 40lbs, 2"x 10" F/D joists @16" o.c. FLAME PRO 3/4 Inch 4x8 Fire Retardant Plywood - The Home Depot Canada Fire-rated plywood is often used in public building construction projects such as hospitals, schools, restaurants, and auditoriums for applications such as wall partitions, ceiling panels, and interior wall panels. Fire-rated OSB: What architects need to know - AIA