When tested separately, gypsum board has a fire resistance level of B1 and is difficult to ignite. When installed in combination with light steel keel to form a partition/ceiling system, it can be judged as an A-level non combustible material according to the national standard GB 8624. It is the most widely used basic fireproof board in indoor decoration.
???? Core Fire Protection Principles
The core component of gypsum board is calcium sulfate dihydrate (CaSO ₄· 2H ₂ O). When exposed to fire, the internal crystalline water evaporates due to heat, absorbing a large amount of surrounding heat. At the same time, a stable insulation layer is formed on the surface of the board, which can effectively delay the spread of fire and provide sufficient time for personnel evacuation.
???? Fire resistance performance of different types of gypsum boards
When tested separately, gypsum board has a fire resistance level of B1 and is difficult to ignite. When installed in combination with light steel keel to form a partition/ceiling system, it can be judged as an A-level non combustible material according to the national standard GB 8624. It is the most widely used basic fireproof board in indoor decoration.
???? Core Fire Protection Principles
The core component of gypsum board is calcium sulfate dihydrate (CaSO ₄· 2H ₂ O). When exposed to fire, the internal crystalline water evaporates due to heat, absorbing a large amount of surrounding heat. At the same time, a stable insulation layer is formed on the surface of the board, which can effectively delay the spread of fire and provide sufficient time for personnel evacuation.
???? Fire resistance performance of different types of gypsum boards
|Type of board | Basic combustion grade | Fire resistance limit | Core characteristics|
|Ordinary paper faced gypsum board | B1 grade | 15-30 minutes | Suitable for areas of ordinary home decoration without special fire protection requirements|
|Fire resistant and fire-resistant gypsum board | B1 grade | 60-120 minutes | Glass fiber added to the board core, which is not easily broken or peeled off at high temperatures|
|High density/composite fireproof gypsum board | B1 level | 180-240 minutes | Stacked fireproof interlayer, suitable for public areas with high-level fire protection requirements|
|Gypsum board+light steel keel system | Grade A | Corresponding board fire resistance limit | System upgrade judgment rules in accordance with the "Code for Fire Protection Design of Interior Decoration of Buildings"|
????️ Selection requirements for different scenarios
Ordinary home decoration ceiling and non load bearing partition wall: Ordinary B1 grade gypsum board can meet daily fire prevention needs, with a conventional thickness of 9.5mm/12mm sufficient for use.
Shopping malls, schools, hospitals and other densely populated public places must use B1 grade fire-resistant gypsum boards with CMA testing reports, with a thickness of 12mm or more, to ensure compliance with fire safety inspections.
Key fire prevention areas such as computer rooms, fire exits, and pipeline shafts: A double-layer 15mm thick fire-resistant gypsum board+light steel keel combination system is used, designed according to Class A non combustible standards, with a fire resistance limit of not less than 2 hours.
✅ Key points for acceptance and pit avoidance
The protective paper of regular fire-resistant gypsum board is mostly marked in red, and the glass fiber filaments inside the board core can be clearly seen on the cross section. Ordinary gypsum board does not have this feature.
It is necessary to request a fire resistance limit test report with the seal of an authoritative third-party organization for the system. It is not acceptable to use only the B1 level test report of a single board to impersonate the A-level qualification of the overall partition wall system, in order to avoid fire inspection jamming.
Special fireproof sealant must be used to fill the joints, otherwise flames can easily enter through the gaps, greatly reducing the actual fire resistance time of the overall system.
Do you need me to compile a fire prevention inspection checklist for gypsum boards based on your local workwear/home decoration scene in Linyi? By checking each item one by one, one can directly avoid the pit for fire inspection rework.
????️ Selection requirements for different scenarios
Ordinary home decoration ceiling and non load bearing partition wall: Ordinary B1 grade gypsum board can meet daily fire prevention needs, with a conventional thickness of 9.5mm/12mm sufficient for use.
Shopping malls, schools, hospitals and other densely populated public places must use B1 grade fire-resistant gypsum boards with CMA testing reports, with a thickness of 12mm or more, to ensure compliance with fire safety inspections.
Key fire prevention areas such as computer rooms, fire exits, and pipeline shafts: A double-layer 15mm thick fire-resistant gypsum board+light steel keel combination system is used, designed according to Class A non combustible standards, with a fire resistance limit of not less than 2 hours.
✅ Key points for acceptance and pit avoidance
The protective paper of regular fire-resistant gypsum board is mostly marked in red, and the glass fiber filaments inside the board core can be clearly seen on the cross section. Ordinary gypsum board does not have this feature.
It is necessary to request a fire resistance limit test report with the seal of an authoritative third-party organization for the system. It is not acceptable to use only the B1 level test report of a single board to impersonate the A-level qualification of the overall partition wall system, in order to avoid fire inspection jamming.
Special fireproof sealant must be used to fill the joints, otherwise flames can easily enter through the gaps, greatly reducing the actual fire resistance time of the overall system.
Do you need me to compile a fire prevention inspection checklist for gypsum boards based on your local workwear/home decoration scene in Linyi? By checking each item one by one, one can directly avoid the pit for fire inspection rework.
Linyi Jinhao Machinery Co., Ltd. is a manufacturer mainly engaged in the production, sales, and service of complete sets of gypsum board equipment, gypsum powder equipment, and other mechanical equipment.
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