Container Prefabricated Housing Steel Structure

The container prefabricated housing steel structure is a modular building system with steel as the main frame, formed through factory prefabrication and on-site assembly. It has characteristics such as high strength, relocatability, and environmental friendliness, and is widely used in fields such as engineering camps, emergency support, and commercial temporary spaces.

I. Core Advantages of Steel Structures

1. Strong Structural Stability
   The steel structure frame forms a self-balancing system through rigid connections between corner fittings and side beams. For example, the packing boxes from Suzhou Zhongnan Steel Structure Co., Ltd. use a full steel structure frame, with measured wind resistance up to Level 12 and earthquake resistance up to Level 8. The frame deformation rate is only 0.18%, far below the industry's qualified threshold of 0.3%. High-strength weathering steel (such as Q355B grade) has a yield strength approximately 30% higher than that of ordinary carbon steel, enabling it to withstand loads under extreme working conditions.

2. Relocatability and Reusability
   Steel structure modular houses support multiple disassemblies and assemblies. The quick-assembly boxes from Suzhou Zhongnan can be disassembled and reassembled more than 15 times, with the cost per use being only one-third of that of a new product. Their connection node design of "wedge-shaped locks + high-strength bolts" controls the displacement within 3 millimeters in vibration table tests simulating rare earthquakes of magnitude 8, facilitating repeated assembly during secondary relocations.

3. Environmental Friendliness and Low Carbon Attributes
   Steel can be recycled throughout its entire life cycle. Each standard 20-foot container consumes about 1.2 tons of steel, with carbon emissions only 43% of those of concrete temporary houses. The factory prefabrication model reduces on-site wet operations, significantly reducing construction waste, dust, and noise pollution.

II. Technical Implementation Paths

1. Factory Prefabrication Production
   Steel structure modules complete the integration of the main structure, water and electricity pipelines, decoration, and soft furnishings in the factory. For example, the modular houses from "Shenshan Construction" integrate water and electricity and internal soft furnishings into each module, allowing for "move-in ready" living with only water and electricity connections required on-site, shortening the construction period by more than half compared to traditional methods.

2. Thermal Performance Optimization
   To address the high thermal conductivity of metal containers, a three-layer composite structure of "rock wool - air layer - aluminum-zinc coated steel plate" is used. The rock wool layer is 75-100 millimeters thick, with a thermal conductivity below 0.040 W/(m·K). Combined with a 5-millimeter air layer to suppress convective heat transfer, the overall heat transfer coefficient (U-value) is below 0.5 W/(m²·K), reducing the risk of condensation.

3. Seismic Connection Node Design
   The Baotou Camp Container House Company forms a broken-bridge lining structure by filling hard polyurethane foam between the steel frame and interior wall panels and adding rubber thermal insulation pads, reducing the heat exchange efficiency between the interior and exterior of the container by about 40% while improving seismic performance.