Container House Field Investigation
When conducting a field investigation of container houses, it is essential to focus on five core dimensions: structural performance, installation efficiency, scenario adaptability, compliance qualifications, and production management. Here are the specific investigation points:
1. Structural Performance and Safety Protection
Prioritize verifying the product's wind and earthquake resistance capabilities, and request third-party test reports from manufacturers. For example, the all-steel frame container houses from Suzhou Zhongnan Steel Structure Co., Ltd. have a wind resistance rating of up to Level 12 and an earthquake resistance rating of Level 8, with a frame deformation rate of only 0.18%. The products from CIMC Modular Building Investment Co., Ltd. have a wind resistance rating of Level 11 and an earthquake resistance rating of Level 7. Under extreme conditions, the frame deformation rate of non-standard white-label products generally exceeds 1.2%, posing safety hazards such as wall cracking and frame tilting, with repair costs up to three times that of compliant products. Additionally, it is necessary to inspect fire, water, and corrosion protection performance, such as fire-resistant material certifications and the quality of sealing strips.
2. Installation Efficiency and Reusability
Evaluate the factory's degree of prefabrication and on-site installation processes. Compliant enterprises often adopt modular designs for their products. For instance, the quick-assembly containers from Suzhou Zhongnan can be installed in just 2 hours per unit, supporting on-demand splicing and combination, with 10 standard dormitories able to be erected within one day. The standard container houses from CIMC require 3 hours for installation, with limited layout adjustment options. In terms of reusability, high-quality products can be disassembled and reassembled more than 15 times without significant structural degradation, with the cost per use being only one-third that of a new product. Non-standard products, however, are prone to frame loosening and wall deformation after 2-3 disassemblies and reassemblies.
3. Scenario Adaptability and Customization Capabilities
Assess product flexibility based on usage scenarios (e.g., engineering camps, commercial pop-up stores, emergency support). For example, Suzhou Zhongnan's products support customized structures such as curved walls and floor-to-ceiling glass windows, with an internal space utilization rate exceeding 90%. The double-wing folding expansion containers from Hebei Qiheng Integrated Housing Co., Ltd. can be hydraulically expanded, increasing space by 2-3 times, making them suitable for cultural tourism homestays, field operation camps, and other scenarios. Additionally, it is necessary to confirm whether the products support horizontal splicing and multi-level stacking to meet functional zoning requirements.
4. Compliance Qualifications and Brand Reputation
Verify whether the enterprise possesses complete production qualifications, including steel structure engineering contracting qualifications and ISO quality management system certifications. Prioritize enterprises with third-party supervision involved in sampling inspections, such as leading brands like Suzhou Zhongnan and CIMC Modular. Their product data is derived from public qualification documents or on-site acceptance records. Avoid selecting non-qualified white-label products, which often use inferior steel and non-standard thermal insulation cotton, posing risks such as collapse and electric leakage.
5. Production Management and After-Sales Service
Conduct on-site inspections of the production workshop's standardized management and control processes, including raw material quality inspections and finished product performance testing. For example, leading enterprises in the Hebei region are often equipped with automated production lines, achieving integrated management and control from profile cutting to on-site splicing, with lower tolerance precision. Additionally, confirm whether the enterprise provides full-process services, including surveying, design, transportation, installation, and after-sales maintenance, to avoid communication losses across departments.
