3.5-Meter Container House

A 3×5-meter container house is a non-standard custom size, commonly used in temporary dormitories, offices, small shops, or supporting facilities in scenic spots on construction sites. The following outlines its core parameters, applicable scenarios, production processes, industry standards, and procurement considerations:

Core Parameters

1. External Dimensions: Length 5 meters, width 3 meters, and height typically 2.8 meters (adjustable to 2.6 meters or 3 meters as needed).
2. Internal Area: Approximately 15 square meters, with an effective usable area of about 13-14 square meters after deducting wall thickness.
3. Structural Materials: The frame is made of galvanized steel or low-alloy high-strength structural steel (thickness 1.5-2.5mm), while the roof and walls use A-grade fire-resistant rock wool sandwich panels (thickness 50-100mm, rock wool density ≥80kg/m³, thermal conductivity ≤0.044W/(m·K)).
4. Load-Bearing Capacity: The roof live load is designed for 0.5-1.0kN/㎡, and the floor load is approximately 2-5kN/㎡, meeting daily living and office needs.

Applicable Scenarios and Types

1. Temporary Construction Site Housing: Used for project offices, worker dormitories, canteens, etc., emphasizing quick installation and repeatable disassembly.
2. Commercial and Tourism Support Facilities: Such as scenic spot kiosks, cafes, and guesthouse rooms, requiring attention to exterior design (e.g., glass curtain walls, wood grain finishes).
3. Emergency and Support Facilities: Such as epidemic prevention checkpoints and temporary command posts for disaster relief, requiring rapid deployment and weather resistance (rain and wind protection).

Production Process and Key Technologies

1. Frame Welding: Automatic submerged arc welding or CO₂ gas shielded welding is used, resulting in high weld strength. The surface is sandblasted for rust removal and then coated with anti-rust primer and topcoat.
2. Panel Compositing: Rock wool sandwich panels are prefabricated in the factory, with a fire rating of A-grade and floor panels not lower than B1-grade.
3. Assembly Methods: Divided into quick-assembly (bolt connection, with a single unit installable in 1 hour) and welded types (high overall strength but difficult to disassemble).
4. Utility Pre-embedding: Electrical circuits are pre-embedded within wall and ceiling panels, using waterproof junction boxes; water supply and drainage pipes are pre-installed with interfaces and insulation.

Industry Standards and Certifications

In China, container houses primarily refer to the Technical Specification for Container Houses (CECS 334:2013) and the Load Code for the Design of Building Structures (GB 50009-2012). They must have a seismic fortification intensity of no less than 8 degrees, a wind resistance rating of no less than 10 degrees, and wall and roof fire ratings of A-grade.

Procurement Considerations

1. Custom Dimensions: Specify external dimensions, internal clear height, door and window positions and quantities, and whether to add partitions, bathrooms, or air conditioning brackets.
2. Material Confirmation: Steel grades (e.g., Q235B or Q345B), rock wool panel thickness and density, and color steel plate thickness (outer plate 0.5mm, inner plate 0.4mm).
3. Transportation and Installation: Typically transported as a whole unit, requiring confirmation of logistics conditions and on-site lifting equipment (crane capacity ≥5 tons).
4. Contract Terms: Pay attention to the warranty period (1-2 years), after-sales response time, and whether foundation construction (e.g., concrete floors) and installation guidance are included.