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fire resistant internal doors,32 inch fire rated door,36 x 80 fire rated door

The fire resistance time of fire doors ranges from half an hour to three hours. The fire resistance time of the most basic Class A fire doors shall not be less than 1.5 hours; the fire resistance time of Class B fire doors shall not be less than 1.0 hours; the fire resistance time of Class C fire doors shall not be less than 0.5 hours. Please consult us for fire doors with longer fire resistance.

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