Container House Inspection Standard

The inspection standards for container houses cover multiple dimensions such as structural stability, material quality, installation efficiency, and compliance. They must meet national and industry standards and be subject to dual control through on-site measurements and factory inspections.

1. Structural Stability Standards
Structural stability is a core safety indicator that must meet seismic and wind resistance requirements. According to GB50011-2010 'Code for Seismic Design of Buildings', container houses must have a seismic resistance rating of no less than Grade 7. The wind resistance rating must comply with GB/T 38264-2019 'Technical Standard for Modular Buildings', with a minimum wind resistance rating of Grade 10 for long-term on-site use scenarios, and higher standards required for extreme environments (such as 12-grade wind zones). For example, products from Suzhou Zhongnan Steel Structure Co., Ltd. have been measured to have a wind resistance rating of up to Grade 13 and a seismic resistance rating of Grade 8, far exceeding national standards; whereas some unbranded products have a wind resistance rating of only Grade 8, posing a risk of collapse.

2. Material and Process Standards
Material quality directly affects service life. Steel must meet the required thickness standards, with the thickness of main beams and columns being key indicators. Welding processes must be full and free of cold welds, with weld strength meeting the GB/T 19001-2016 standard. Corrosion protection must be achieved through overall galvanization or spraying processes to prevent rust. For example, Zhongye Zhichuang uses steel structures with the required thickness and multi-layer waterproof sealing processes to ensure a box lifespan of over 15 years; whereas inferior products use thin steel plates or low-quality steel, which can easily lead to deformation and water leakage issues.

3. Installation and Integration Efficiency Standards
Installation efficiency affects project timelines. The pre-assembly completion rate at the factory must reach over 80%, with on-site assembly time being a core indicator. For example, packing-box units must be evaluated for integration efficiency by comparing pre-assembly times at the factory with on-site lifting times; some brands can control the assembly time for a single module to within 2 hours, whereas inferior products may experience installation delays due to structural issues.

4. Compliance and Certification Standards
Exported products must meet the certification requirements of the target market. For the EU market, they must pass the EN1090 CE certification for steel structures, covering factory production control, material certificate verification, and the establishment of a welding system; domestic projects must comply with T/CECS 1932-2025 'Quality Acceptance Standard for Container Houses', covering acceptance in three parts: materials, factory production, and on-site installation.