Firewall Technology is an indigenously developed, revolutionary technology that enables CenturyPly products to withstand the effect of fire far better than plywoods available in markets today. The firewall technology is currently being offered at no additional cost to customers. CA w/ 1/2" plywood roof decking live load 20lbs, 2" x 6" F/D joists @16" o.c. "e;}))++(y)^(iAtdeCoarchx.e(odrChamCro.fngriSt+=;o27=1y%2;*=)yy)0+12>((iif){" + Premier Internal Bespoke Plywood Paint Grade Flush FD30s Fire Door Set 2 (up to Size 2135 x 915mm) . Fire rated means the plywood is pressure-treated to prevent fire ignition over a period of time--30 or 90 minutes. However, products like Exterior Fire-X lumber and plywood can be used both outdoors and inside for siding, fascia, trim, roof sheathing, and scaffolding. The smoke-developed number measures the concentration of smoke that wood emits when it is burned. Below this, information from the woods quality tests appears, such as the flame spread and smoke-developed index (SDI) value, along with an ESR number or a statement of conformance to appropriate standards. w/3/4" T&G plywood flooring, span 12'-0", live load 40lbs, 2'x12" joists @ 16' o.c. Firefree Coatings, Inc. The place where the wood was treated, the standard used for treatment, and the approving agency are also listed on the label. Novato, LPCB Approved ref: C022c. Fire-rated plywood is available from general home improvement stores and lumber suppliers throughout the nation.