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GB 50222-2017 第2.0.2条 Code for Fire Protection Design of Building Interior Decoration

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GB 50222-2017 第2.0.2条

| | **Combustion performance rating**: Decorative materials are classified by combustion performance into Class A (non-combustible), Class B1 (flame-retardant), Class B2 (combustible), and Class B3 (flammable). In hotel buildings, areas such as evacuation corridors and safety exits are required to use Class A or Class B1 materials. |

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