Fireproof Cotton for Container Houses

Container houses use fireproof cotton (rock wool board) as filler, which can meet Class A fire protection standards and is a key material for ensuring fire safety.

The Role of Fireproof Cotton in Container Houses

The filler material in container houses directly affects their fire protection performance. Rock wool board (fireproof cotton), as a Class A non-combustible material, has the characteristics of high-temperature resistance and strong thermal insulation. Its melting point exceeds 1000℃, which is much higher than the critical temperature (500℃) at which steel structures lose stability. In a fire, rock wool board can effectively delay the spread of the fire, buying time for personnel evacuation and firefighting. For example, in the container fire incident in Linping District, Hangzhou, if the house had been filled with rock wool board, it might have prevented the ignition of internal flammable materials and reduced property losses.

Application Specifications and Requirements for Fireproof Cotton

According to fire safety standards, container houses must be filled with Class A fireproof materials, such as rock wool and glass wool. Flammable materials like polyurethane and polystyrene (with low ignition points and poor flame retardancy) are strictly prohibited because they will burn rapidly when exposed to open flames or high temperatures and release toxic gases. In addition, house design must comply with regulations:

• Safety distance: There should be at least a 6-meter spacing between container panels to prevent the spread of fire through thermal radiation or flying embers.
• Electrical safety: Wires need to be protected with sleeves, and switch boxes should be made of metal galvanized material and installed in an exposed manner to avoid short circuits that could cause fires.
• Passageway design: The width of internal passageways must meet evacuation requirements, and it is prohibited to occupy safety passageways for building houses.

Typical Cases of Container Houses with Fireproof Cotton

• Wuhan Jinxiang Light Steel Housing Co., Ltd.: Its fireproof containers are made of Class A rock wool sandwich panels with wall thicknesses ranging from 50-100mm. They can withstand winds of force 10-12 and earthquakes of magnitude 7 or above, with a service life of 15-20 years. They are widely used in scenarios such as construction site dormitories and cultural and tourism homestays.
• Weifang Jinruiyuan Steel Structure Co., Ltd.: Its products ensure structural stability through full-welding processes and thickened profiles. The wall fire ratings reach Class A/B1, meeting national fire protection standards. They support multi-layer stacking and rapid relocation.

Maintenance and Precautions for Fireproof Cotton

Even when using fireproof cotton, it is still necessary to regularly inspect the condition of the house:

• Avoid placing heat sources or open flames close to the house, and maintain a safe distance during open-flame operations.
• Equip with simple firefighting equipment (such as dry powder fire extinguishers).
• Do not privately modify electrical wiring or use high-power electrical appliances.