Fire rating up to two hours ( , 1, 2 hrs ). High quality galvanized steel doors that inhibit fire, insect attacks and organic decay. Special double rebate frame made of 1.6mm (16 SWG) galvanized sheet, with holdfastsAnchor fasteners provided for grouting. Shutter of overall thickness 43mm thick formed out of two outer skin panels of 1.25mm Galvanized steel sheets. Doors made using the multibend construction and weldless lock seam joinery technique for a dent free finish. Reinforcements at the top, bottom and locking area make the door burglar resistant. Etch primer coating on frames and shutter, followed by an epoxy zinc phosphate primer, and a final coat of high quality NC paint for higher durability and resistance against corrosion. Premium quality SS ball bearing hinges that are flushed with the frame. Proprietary Non asbestos environment friendly infill material. Available in standard sizes. Customization on specific request.