Container House Risk Assessment Form

The risk assessment of container houses should be carried out from five dimensions: structural safety, fire safety, usage environment, maintenance and emergency response, and compliance. The specific assessment criteria and risk points are as follows:

I. Structural Safety Risks The steel frame must have a thickness of ≥1.2mm and be free from rust and deformation; otherwise, it may lead to collapse or local load-bearing failure. Wall panels and roofs should use rock wool boards (density ≥120kg/m³) or foam materials that comply with fire safety regulations. If flammable sandwich panels (such as polyurethane) are used, they will melt and drip at 80℃, accelerating the spread of fire. During inspection, use vernier calipers to measure the thickness of the steel and a tape measure to measure the thickness of the wall panels, and check for cracks by tapping and listening.

II. Fire Safety Risks The fire resistance rating must reach a fire endurance limit of ≥1 hour (GB/T 9978-2008). For fillers, prioritize Class A fire-resistant rock wool boards or fire-resistant cotton. Poor-quality sandwich panels (such as EPS foam) produce highly toxic combustion products, which can easily cause casualties. For electrical safety, cables must have a flame-retardant rating of Class B1, and the grounding resistance of sockets must be ≤4Ω. Aging electrical lines or circuit breaker failures may ignite weeds or sandwich materials. Inspection requires verification of third-party test reports and measurement of grounding resistance with a multimeter.

III. Usage Environment Risks The spacing between container panel rooms must be ≥6 meters; insufficient spacing can easily lead to a chain spread of fire. Heat sources (such as air conditioning outdoor units) must be kept away from flammable materials, and open flame operations must maintain a safe distance from the panel rooms; otherwise, local high temperatures may trigger spontaneous combustion of the sandwich materials. The design of escape routes must ensure that there are no collapse obstacles during a fire, which would increase rescue difficulty.

IV. Maintenance and Emergency Response Risks Bolts must be checked monthly for tightness (torque ≥50N·m), and anti-corrosion paint must be reapplied annually. Loose bolts or damaged coatings can accelerate steel rusting, leading to structural instability. Simple firefighting equipment must be provided, and a fire escape route map must be formulated. The lack of an emergency plan may result in trapped personnel being poisoned by thick smoke or being unable to evacuate in a timely manner.

V. Compliance Risks Suppliers must provide material certificates, specifications, and recycling attribute descriptions. The use of poor-quality materials (such as wall panels with insufficient thickness) may result in fire safety rectifications or legal liabilities. The house must comply with standards such as the "Code for Acceptance of Construction Quality of Steel Structures" (GB 50205-2020). Failure to meet the standards may result in work stoppage penalties or potential safety hazards.

Recommendation: Refer to the template of the "Container Panel Room Acceptance Form" to supplement details and entrust a testing agency with CMA qualification to conduct professional acceptance to comprehensively avoid risks.