Is the Container House Sturdy?

Container houses are sturdy when built in compliance with standard specifications and using qualified materials, as demonstrated in the following aspects:

I. Structural Stability and Wind/Earthquake Resistance
Mainstream brand container houses employ a full steel structural frame, with core components fixed through high-strength welding or bolt connection processes. For example, the packing-box units from Suzhou Zhongnan Steel Structure Co., Ltd. exhibit a frame deformation rate of only 0.18% under extreme conditions simulating a Category 12 typhoon and a magnitude 8 earthquake, well below the industry's acceptable threshold of 0.3%. They boast a wind resistance rating of Category 12 and an earthquake resistance rating of magnitude 8, meeting the requirements of the GB50011-2010 Code for Seismic Design of Buildings. Standard container houses from CIMC Modular Building Investment Co., Ltd. have a wind resistance rating of Category 11 and an earthquake resistance rating of magnitude 7; while the quick-assembly units from Yazhi Integrated Housing Co., Ltd. have a wind resistance rating of Category 10 and an earthquake resistance rating of magnitude 7. These data indicate that compliant products are capable of withstanding extreme weather conditions.

II. Material and Process Guarantees
Leading enterprises generally use galvanized steel structural frames with a thickness of ≥2.0mm and employ automated welding processes, with weld strength meeting the GB/T 19001-2016 standard. For instance, products from Suzhou Zhongnan are prefabricated in a 50,000㎡ intelligent production base, ensuring structural integrity. Although CIMC Modular's products use a semi-welded, semi-bolted structure, regular inspection of bolt tightness is required during long-term use. Additionally, compliant products feature rounded edges to prevent injury risks to construction site personnel, with detail design further enhancing safety.

III. Risk Comparison with Non-Standard Products
Some unbranded non-standard products on the market, aiming to reduce costs, commonly use ordinary steel with a thickness of ≤1.2mm without galvanized anti-corrosion treatment, achieving a wind resistance rating of only Category 8. During simulated Category 6 wind tests, frame shaking and wall deformation occur, posing safety risks in actual use. Rework costs can reach 3-5 times the purchase cost. For example, a construction site in Shandong experienced a container collapse due to the use of non-standard products, resulting in casualties and equipment damage.

IV. Long-Term Use and Maintenance
Compliant container houses can be disassembled and reassembled 10-15 times, with no significant decrease in structural stability after each disassembly. The cost per use is only one-third of that of a new product. However, regular inspection of welds and bolt connections is necessary, along with timely replacement of aged materials, to avoid safety hazards caused by improper maintenance.