Container Modular House Specification
The core technical specifications for container modular houses mainly revolve around CECS 334:2013 'Technical Specification for Container Modular Combined Houses', JGJ/T 469-2019 'Technical Specification for Container-Type Combined Houses', and GB/T 51329-2018 'Technical Standard for Container Modular Buildings'. The following provides an explanation from key aspects such as scope of application, structural loading, fire prevention and corrosion resistance, and installation techniques:
Scope of Application and Basic Requirements The specification is applicable to the design, construction, and acceptance of low-rise and multi-story container modular combined houses, with a maximum of 6 stories and a height not exceeding 24 meters, and a seismic fortification intensity not exceeding 8 degrees. The design service life is divided into 50 years (structural safety grade ≥ 1.0) or 25 years (≥ 0.95). Existing containers must comply with the GB/T12418 maintenance standard, ensuring that the beams and columns are free from defects, the corner fittings are intact and reliable, and are accompanied by quality certification documents.
Structural Loading and Construction Specifications In pure steel frame structures, wall panels, roof panels, and glass do not bear loads. The load transfer path is 'panel secondary beam → main beam → corner column → corner fitting → foundation/lower container'. Corner fittings are the only stacking load transfer points, and spot welding is prohibited as a substitute. Steel selection must comply with standards: welded weathering steel (GB/T 4171) for containers, and Q235B or Q345B (GB/T 700, GB/T 1591) for non-container components. When large openings weaken stiffness, perforated and non-perforated containers should be arranged in a staggered and symmetrical manner. The overhang length should not be excessive, and no openings are allowed in the overhanging sections. When stacking multiple containers, corner fittings and corner columns must be aligned vertically and locked tightly to ensure that the lateral force-resisting members are symmetrical in plan and uniform in vertical stiffness.
Fire Prevention and Corrosion Resistance Requirements The use of flammable core materials such as EPS for enclosure filling is prohibited. In crowded places, Class A rock wool or glass wool should be used, and the fire resistance limit should be controlled according to GB50016 (commonly required to be ≥ 0.5 hours, with stricter requirements for high-rise modules). Steel structures must be coated with fire-resistant coatings, and floor-level fire separations should be set up. Emergency escape routes (with a clear width ≥ 0.9 meters), fire extinguishers, smoke detectors, and emergency lighting should also be provided, with standards consistent with those for public buildings.
Installation Techniques and Acceptance Standards During installation, the airtightness, thermal insulation, waterproofing, and moisture resistance of the containers must be tested. Concealed works (such as the installation of water, electricity, and gas, as well as moisture-proof and waterproof treatments) must be strictly controlled to avoid potential safety hazards in the later stages. The construction and acceptance specifications clearly define the allowable deviations for on-site installation, requirements for rust removal and painting, and the engineering acceptance process to ensure that the structural safety and functional requirements are met.
