When the area of fire-proof glass of fire-proof door with glass exceeds 15% (referring to the comparison between the glass embedded in a single door leaf and the door leaf), it shall be regarded as different units. If the area of fire-proof glass of fire-proof door with glass exceeds 15%, it shall not be classified as the same unit with the area of fire-proof glass less than or equal to 15% of the door area.

The area of fire-proof glass reaches or exceeds 30% of the area of fire-proof door leaf, which is regarded as glass fire-proof door. There is no standard. The data from the implementation rules for type approval of fire-proof products (Revised Version) of the fire product conformity assessment center of the Ministry of public security belongs to internal data, which can only be issued by our fire-proof door enterprises.

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