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By fire door hardware we mean all the elements that take place in tests of resistance against fire in doors, such as locks, hinges, door closers, handles, panic bars, etc. The purpose of these fittings is to keep the door closed in order to avoid transmission of smoke and gas and prevent the flames

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Any doorways that are cut into fire walls must be outfitted with doors which also resist the spread of flames and smoke. These are known as “fire doors.” All materials which are used to construct them, including door hardware like exit devices, door closers, locks, knobs, etc. must also be combustion-resistant.

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