Dandong Container House Construction

The construction of container houses in Dandong requires comprehensive consideration of multiple factors, including design planning, technical specifications, material selection, construction process, and post-construction maintenance.

I. Design Planning
The design of container houses should focus on spatial layout and functional zoning. Functional areas can be expanded through the combination of containers (e.g., joining 2-3 containers) or staggered stacking to form spaces such as living rooms, bedrooms, and bathrooms. For example, connecting two containers can create a single-story layout of approximately 100 square meters, including a living-dining area, two bedrooms, and a bathroom with a bathtub. Additionally, proper planning of lighting and insulation is essential: installing large floor-to-ceiling windows and roof skylights to enhance indoor brightness; adding internal insulation layers to walls/roofs and selecting triple-glazed windows to improve thermal insulation, ensuring warmth in winter and coolness in summer.

II. Technical Specifications and Structural Safety
Container houses must comply with modular housing technical regulations:

1. Structural Requirements: Adopt a pure steel frame load-bearing system, with corner fittings as the sole stacking load transfer points, ensuring alignment and secure locking of upper and lower containers. Steel materials should be selected from welding weathering steel (GB/T 4171) or Q235B/Q345B (GB/T 700, GB/T 1591), avoiding spot welding as a substitute for standard connections.
2. Fire Prevention and Corrosion Resistance: Prohibit the use of flammable materials such as EPS for enclosure filling. For crowded venues, use Class A rock wool/glass wool with a fire resistance limit of ≥0.5 hours. Steel structures must be coated with fire-resistant paint and equipped with safety facilities such as escape routes and fire extinguishers.
3. Seismic Resistance and Building Height: Suitable for low-rise and multi-story buildings (up to 6 stories, height ≤24 meters, seismic fortification ≤8 degrees). The design service life is categorized into two types: 50 years (≥1.0) or 25 years (≥0.95).

III. Material Selection and Construction Key Points

1. Materials: Prioritize steel containers for their strength and durability. Although aluminum containers are lightweight, they are more costly. Composite sandwich panel containers require strict testing of the fire resistance of the core material.
2. Construction Process: Includes steps such as steel frame welding, color steel plate joining, floor laying, installation of lighting and air conditioning holes, security net installation, and gap sealing. For example, the chassis crossbeams are welded using 4×8×2.0 square steel with a spacing of 35 centimeters to ensure load-bearing stability.
3. Approval and Compliance: If constructing on rural residential land, obtain construction approval and provide structural drawings. Leased land is limited to temporary use, and the contract must specify the intended use.

IV. Post-Construction Maintenance
The main body of the container is made of steel and requires regular rust prevention treatment: during construction, grind and paint cut and welded edges with epoxy primer and topcoat; annually inspect welds, corners, and other rust-prone areas, and immediately repaint any rust spots found; in inland dry areas, recoat the anti-corrosion layer every 8-12 years, in southern humid areas every 7-10 years, and in coastal areas every 3-5 years. Additionally, regularly replace window and door seals (every 5-7 years) and clean roof debris to prevent water accumulation.