30 x 78 fire rated door,fire rated double swing doors,fire rated garage door

Fire doors are classified as Class A, Class B and Class C. Class A fireproof door is full steel plate, which can protect for 70 minutes. Class B fireproof door is made of all steel, which can protect for about 50 minutes. Part of Grade C fireproof doors are made of wood and can be protected for about 35 minutes.

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