How to Write the Process of Prefabricated Housing

The construction process of prefabricated housing mainly falls into two categories: modular construction and prefabricated concrete housing, with core processes including factory prefabrication, transportation, and on-site construction.

Modular Construction Process

1. Factory Prefabrication Stage The building is disassembled into individual modules (such as ceilings, walls, plumbing and electrical lines, etc.), which are manufactured on factory assembly lines. For example, the China Construction HaiLong Intelligent Construction Industrial Park achieves parallel operations through a three-dimensional factory, using welding robots and highly automated equipment for final assembly. Each module comes with a detailed 'ID card' (project name, product model, production date, etc.), with error control measured in millimeters to ensure precise assembly.
2. Transportation and On-Site Assembly Modules are transported to the construction site in containers and quickly assembled using equipment such as tower cranes. For example, the Shenzhen affordable housing project was assembled from 6,028 concrete modules, with five buildings nearly 100 meters tall completed in just one year, reducing the traditional construction timeline by over 60%. Only partial structures require on-site casting, significantly reducing noise, dust, and construction waste.

Prefabricated Concrete Housing Construction Process

1. Foundation Preparation Clear obstacles in the construction area, excavate and compact the foundation according to design requirements to ensure flatness and load-bearing capacity.
2. Factory Prefabrication of Components Concrete components such as wall panels, floor slabs, beams, and columns are manufactured in the factory according to design drawings, with some using galvanized steel structures or fluorocarbon paint coatings to enhance durability.
3. On-Site Construction Stage
   • Concrete Pouring: Secure the foundation and prefabricated components to ensure compactness.
   • Component Assembly: Complete the main structure through three-dimensional connections, floor slab installation, and beam-column fixation, requiring precise measurement and adjustment.
   • Wall Treatment: Plaster, paint, or bricklay to improve appearance and durability.
   • Installation of Doors, Windows, and Piping: Arrange water, electricity, and gas pipelines, and seal door and window frames.
   • Roof Construction: Build the structure and lay the roofing, applying waterproofing treatment.
   • Interior Decoration: Lay floors, install ceilings, and decorate walls.

Key Characteristics Comparison

Modular construction reduces the construction timeline by over 60% and on-site labor by 50%, making it suitable for high-rise affordable housing or rapid overseas deployment projects (e.g., American buyers purchasing Chinese prefabricated houses through cross-border e-commerce and completing assembly within 24 hours). Prefabricated concrete housing requires on-site casting and gradual assembly but has lower costs (e.g., approximately $14,000 for a 28-square-meter two-bedroom unit), making it suitable for low-rise residential buildings or short-term rental accommodations. Both forms must strictly adhere to design requirements and process standards to ensure quality and safety.