Construction of Two-Story Container House

The construction of a two-story container house should follow the following specialized plan, covering project overview, construction preparation, process, and precautions:

I. Project Overview
The project utilizes modular container units for assembly, with a total construction area of approximately 800㎡. It is planned to include 16 dormitory rooms, 2 public restrooms, 1 shower room, and 1 activity room. The ground floor is elevated 30cm for moisture prevention and ventilation, with a designed service life of 5 years, a seismic fortification intensity of 7 degrees, and a fire resistance rating of Class II.

II. Construction Preparation

1. Technical Preparation: Organize technical personnel to familiarize themselves with drawings and specifications, prepare construction organization design and safety plans, and complete technical disclosures.
2. Material Preparation:
   • Container Units: Standard dimensions of 6058mm×2438mm×2896mm, with a box body made of Q235B steel, side panels 1.2mm thick, and roof panels 1.5mm thick.
   • Foundation Materials: C30 concrete for pouring strip foundations, equipped with φ16mm anchor bolts, 10mm thick embedded steel plates, and M16 nuts.
   • Connecting Components: Custom-made connecting corner pieces forged from Q355B steel (surface hot-dip galvanized), equipped with M20 high-strength bolts.
   • Auxiliary Materials: Sealant, fire-resistant rock wool with a density of 120kg/m³, waterproof membranes, aluminum alloy doors and windows, etc.
3. Equipment Preparation: Equip with a 25-ton truck crane, total station, level gauge, AC electric welding machine, etc.

III. Construction Process

1. Foundation Construction: Position and set out to determine reference points and elevation control lines, pour strip foundations and embed anchor bolts, ensuring foundation flatness error ≤5mm.
2. Container Hoisting: Use a 25-ton truck crane for layered hoisting, secure the box bodies with special connecting corner pieces and high-strength bolts, with bolt torque reaching the design value (usually ≥200N·m).
3. Structural Reinforcement: Stack containers following mechanical principles, align corner pieces of upper and lower boxes, form an overall frame horizontally through connecting corner pieces to enhance lateral resistance performance.
4. Decoration and Finishing: Use calcium silicate board for internal partitions, PVC ceiling, and composite wood flooring, fill gaps with sealant; fill fire-resistant rock wool between external walls and floor slabs, with a thickness ≥50mm; lay waterproof membranes on the roof with a slope ≥2% for drainage.

IV. Precautions

1. Regulatory Requirements: Construction must comply with the "Load Code for the Design of Building Structures" (GB50009-2012), "Standard for Design of Steel Structures" (GB50017-2017), etc., to ensure structural safety.
2. Pre-assembly Inspection: Container units must undergo dimensional deviation checks before entering the site, with length errors ≤±3mm and diagonal differences ≤±5mm to avoid installation difficulties.
3. Winter Construction: If the ambient temperature is below 5℃, take insulation measures such as covering with insulation boards or installing temporary floor heating to prevent concrete freezing or sealant failure.
4. Fire Protection: A fire resistance rating of Class II requires steel structural components to be painted with fire-resistant coatings with a fire resistance limit ≥1 hour; electrical circuits should be protected by metal conduits to avoid short circuits causing fires.