Railway Container Refitted Housing

Railway container refitted housing is a method that transforms steel containers originally used for cargo transportation into residential building units with the ability to be repeatedly assembled and disassembled through secondary design and system integration. The following is an introduction from multiple aspects:

I. Structural Mechanics Optimization

The spacing between the longitudinal beams of the bottom frame of traditional containers is relatively large. Using them directly as living spaces would result in insufficient floor stiffness. Taking Baotou Xinxing Color Plate Steel Structure Manufacturing Co., Ltd. as an example, it adopts the method of adding C-shaped steel purlins between the bottom beams to evenly distribute the load to each main beam, enabling the container to maintain structural stability even when stacked three layers high. After shot blasting and rust removal on the container surface, a layer of zinc-rich primer and polyurethane topcoat is applied. This protective system can maintain the effective service life of the steel for more than 15 years in the windy and sandy environment with large temperature differences in northwest China.

II. Improvement of Thermal Insulation Performance

Container houses face the challenge of the thermal bridge effect of metal container walls. The improved solution is to adopt a broken-bridge lining structure, that is, to fill hard polyurethane foam between the steel frame and the inner wall panel, and add rubber thermal insulation pads at the connections of the keels, reducing the heat exchange efficiency between the inside and outside of the container by about 40%. For camp dormitory projects, such treatment can make the indoor temperature 8 to 10 degrees Celsius higher than the outside in winter without heating, thereby reducing the energy consumption dependence on heating equipment.

III. Environmental Protection and Recycling

The core value of container houses lies in the full life-cycle recycling of their materials. Each standard 20-foot container consumes about 1.2 tons of steel. If a one-time poured concrete temporary house is used, the carbon emissions of the concrete and steel bars required for the same area are 2.3 times that of a container house. More crucially, when the camp is relocated or the project is completed, the container house can be hoisted as a whole to a new site, with the disassembly and assembly loss rate controlled within 5%. Compared with traditional prefabricated houses, which require the replacement of a large number of panels each time they are disassembled, this modular moving method significantly reduces the generation of construction waste.