Is It Safe to Convert Containers into Houses?

Converting containers into houses is not necessarily safe, and its safety is influenced by multiple factors.

I. Numerous Safety Hazards Exist

1. Poor Fire Resistance of the Structure: Container houses often use steel structures for support. In a fire, the temperature in the fire scene can reach 800 - 1000℃, far exceeding the 500℃ critical temperature at which steel structures lose their static equilibrium stability. Ordinary container houses generally lose their load-bearing capacity and collapse within about 10 minutes after a fire breaks out, which is not conducive to personnel evacuation and rescuing supplies.
2. Flammable Core Materials: Some container houses use flammable materials such as polyurethane and polystyrene to fill the core of the panels. These materials have a low ignition point and poor flame retardancy. When exposed to high-temperature sparks, short-circuited wire beads, or open flames, they will immediately catch fire. Moreover, the honeycomb structure of the materials increases the contact area with air, leading to intense combustion.
3. Narrow Internal Passageways: Some users, in pursuit of usable area, do not leave safety passageways and evacuation spaces that meet regulatory requirements. They even build structures that occupy safety evacuation passageways. In case of a fire, personnel evacuation will be hindered.
4. Other Hazards: There are widespread issues such as unauthorized electrical wiring, mixed use of high-power electrical appliances, and the use of bottled gas indoors, which pose prominent risks of electric shock and fire. Some also illegally occupy collective land and rural roads, blocking fire access.

II. Legality Affects Safety If containers are placed in unsuitable residential areas such as public roads and green spaces without permission, or if they are renovated for residence in violation of building safety, fire protection, and other regulations, they are considered illegal structures. Such houses often lack standardized safety design and supervision, resulting in greater safety hazards.

III. Not Suitable for Long-Term Residence Container houses have a relatively short service life, approximately 10 - 15 years. As the service life increases, related safety hazards also increase. Moreover, their internal area is relatively small, which can easily cause long-term physical and mental discomfort for occupants and is not suitable as a long-term residential housing option.