Dunhuang Container House Installation

The installation of container houses in Dunhuang requires a combination of professional design, standardized construction processes, and key technical details to ensure structural stability, complete functionality, and compliance with safety standards.

I. Pre-installation Preparation and Foundation Requirements

1. Site Planning and Foundation Treatment
   The ground must be leveled in advance to ensure the foundation bearing capacity meets requirements. For long-term use scenarios, it is recommended to use concrete piers or pile foundations to prevent settlement; for temporary use, brick foundations or tooling platforms can be used. The foundation must have a reserved drainage slope to prevent water accumulation and subsequent steel plate corrosion. For example, in the installation of color-steel container houses in Jiuquan City, it is explicitly required that the foundation flatness error be ≤3mm, and drainage pipes be pre-embedded.

2. Material and Tool Preparation
   The main body of the container house is made of hot-dip galvanized steel frames or aviation aluminum shells. It is necessary to check the thickness of the steel, the quality of the welds, and the integrity of the anti-corrosion coating. Tools include fasteners such as hexagon socket bolts, self-tapping screws, round-head drill tail screws, and cross-head flat-head燕尾丝 (Note: '燕尾丝' may not have a direct English equivalent; it could be a specific type of screw; here it's kept as is for context, but in a real scenario, a more precise translation or description would be needed), as well as measuring equipment such as electric drills, spirit levels, and plumb lines.

II. Core Installation Process

1. Bottom Frame and Floor Installation

   • Connect the bottom corners of the container to the bottom beams using hexagon socket bolts, adjust the diagonal error to be ≤3mm, and then tighten.
   • Install π-shaped secondary beams, fix them with M5.5×19 self-tapping screws, and reinforce the top with ST4.8×16 round-head drill tail screws at the bottom beams.
   • Lay magnesium oxide board substrates, splice them along the 6-meter direction and align the cut corners with the chalk lines; the floor splice should coincide with the centerline of the π-shaped beams, fix them with ST4.2×38 cross-head flat-head燕尾丝 (same note as above), and space the nails at intervals of 300-350mm.
   • Grind the floor seams, apply PVC special adhesive, lay floor rubber, and weld the splices to enhance sealing.

2. Wall and Roof Assembly

   • For foldable containers, first hoist the main frame, stabilize it with support rods after unfolding, and then push open the walls one by one and tighten the screws.
   • For conventional container houses, weld the steel beams and square tube columns, use a plumb line to calibrate the verticality, and ensure the component dimensions comply with the design drawings.
   • When installing wall panels, reserve positions for doors and windows. After the exterior walls are completed, install the roof panels, and make waterproof treatments at the joints between the roof panels and wall panels.

III. Key Technical Details

1. Wind and Earthquake Resistance Design
   For outdoor long-term use scenarios, steel frames should be added at the corners for reinforcement, and concrete piers should be made at the bottom. For example, a manufacturer in Guangzhou achieved a wind resistance rating of Level 12 for container mobile homes through the use of bottom concrete piers and anti-corrosion wood exterior walls.

2. Sealing and Anti-corrosion Maintenance

   • The areas around doors and windows, container body splices, and roof gutters should have their sealant replaced every 5-7 years, and the roof should be cleared of fallen leaves annually to prevent water accumulation.
   • All cut and welded edges must be ground and then coated with epoxy primer + topcoat. In inland areas, the anti-corrosion coating should be reapplied every 8-12 years, while in coastal areas, this interval should be shortened to 3-5 years.

3. Concealed Work Acceptance
   The installation of water and electricity and moisture-proof treatments must strictly follow regulations. For example, Zhongnan Steel Structure requires PVC扣板 (PVC ceiling panels) to be installed after the installation of water and electricity lines, and the party A (client) to be notified to pour the ground to ensure the integrity of the waterproof layer.