Fire Resistance Rating of Container Houses

The fire resistance rating of container houses varies depending on the classification criteria, primarily divided into international standards, national standards, and material performance ratings.

I. Fire Resistance Rating Classification under International Standards International standards classify the fire resistance rating of containers into three levels: A, B, and C:

• Level A: The highest fire resistance rating, with thermal insulation layers made of high-temperature insulation materials such as asbestos, capable of withstanding temperatures up to 1100℃ in fires, suitable for scenarios with extremely high fire prevention requirements.
• Level B: Thermal insulation layers made of medium-temperature materials such as glass wool, with a fire resistance temperature of up to 800℃, suitable for general fire prevention needs.
• Level C: The lowest fire resistance rating, with thermal insulation layers made of low-temperature materials such as polystyrene boards, with a fire resistance temperature of 600℃, mostly used in temporary or low-risk scenarios.

II. Fire Resistance Rating Classification under National Standards According to China's "Code for Fire Protection Design of Buildings" (GB50016-2014), the fire resistance rating of buildings is divided into five levels, with container houses typically falling between Level I and Level III. The specific rating needs to be evaluated based on materials and structure:

• Level I: The highest fire resistance limit, suitable for high-rise buildings or places with dense populations.
• Level II: Commonly found in ordinary industrial or civil buildings, meeting general fire prevention requirements.
• Level III: Mostly used in temporary buildings or low-risk areas, requiring material optimization to enhance fire prevention performance.

III. Impact of Material Combustion Performance Ratings The fire resistance performance of container houses also depends on the combustion performance ratings of key materials (GB8624 standard):

• Wall/Roof Insulation Core Materials: Regular fire-resistant residential containers must meet at least Level B1 (flame-retardant, such as flame-retardant polyurethane), with Level A (non-combustible, such as rock wool boards) mandatory for high-end venues.
• Internal Decoration Materials: Wall and ceiling panels should preferably use Level B1 or Level A materials to reduce the risk of fire spread.
• Main Structural Steel Frame: Steel itself is a Level A non-combustible material, but it needs to be protected with fire-resistant coatings or thermal insulation layers to ensure the fire resistance limit meets the specifications (e.g., 0.5 hours or 1 hour or more).

IV. Common Fire Resistance Parameters of Container Houses The fire resistance rating of 20-foot, 40-foot container houses and offices is mostly Level A (1 hour), but specific parameters vary depending on the manufacturer and design structure. For example, some products can further enhance the fire resistance limit by increasing the thickness of rock wool boards or optimizing the steel frame structure.