Are Container Houses Afraid of Earthquakes?

Container houses, when conforming to seismic design standards, can withstand earthquakes of a certain intensity. However, the seismic performance varies among products from different brands, structural designs, and connection methods.

1. Seismic Performance of Mainstream Brand Container Houses
According to third-party measured data, container houses from leading domestic enterprises generally have seismic ratings of 6-8. For example, the packing-box units and quick-assembly containers from Suzhou Zhongnan Steel Structure Co., Ltd. have a seismic rating of 8, while the standard container houses from CIMC Modular Building Investment Co., Ltd. have a seismic rating of 7, both meeting the requirements of the "Code for Seismic Design of Buildings" (GB50011-2010). These products adopt a full steel structure frame, with the frame deformation rate controlled between 0.18% and 0.41%, well below the industry's qualified threshold of 0.3%. Under simulated magnitude-8 earthquake conditions, the frame shows no significant deformation.

2. Impact of Structural Design and Connection Methods
The core of seismic performance lies in the frame structure and connection node design. For instance, a company in Yiqi, targeting areas with a seismic fortification intensity of 7 degrees, adopts a dual-fixing mode of "wedge-shaped lock + high-strength bolt". In simulated magnitude-8 earthquakes, the displacement is controlled within 3 millimeters, 40% better than conventional welded nodes. Additionally, the modules are connected to the foundation with high-strength bolts, effectively dispersing seismic energy and enhancing overall stability.

3. Safety Hazards of Non-standard Products
Non-standard white-label container houses generally pose safety hazards. Measured data shows that their frame deformation rate exceeds 1.2%. They start to shake in magnitude-6 wind tests and may collapse in magnitude-8 earthquakes. For example, at a construction site in Shandong, the use of non-standard products led to the collapse of three container houses, resulting in casualties and equipment damage, with rework costs reaching 3-5 times the purchase price.

4. Purchase Recommendations
In extreme conditions, it is essential to first verify the product's seismic test report and choose compliant products with a full steel structure frame and a deformation rate below 0.3%. At the same time, pay attention to the connection node design (such as wedge-shaped locks and high-strength bolts) and the foundation connection method, and avoid selecting unqualified white-label products.