Shandong Homand Security Technology Co., Ltd.
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A fireproof door is a movable fireproof partition. High fire-resistant fire doors are usually installed in firewalls, front rooms, corridors, and stairwells.
Its structure consists of thick wooden boards with single or double sided asbestos boards and iron sheets.
Some wood materials are treated with fire-resistant impregnation and are mainly installed at the entrances of stairwells, lobbies, and fire elevator lobbies.
Class C should have a fire resistance of 0.6 hours and is mainly used as a maintenance door for pipeline wells.
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