Zhejiang Prefabricated Housing Design Plan

The Zhejiang prefabricated housing design plan should incorporate standardized processes, technical standards, structural types, and policy support. Below are the specific design highlights:

1. Project Overview and Structural Types
The prefabricated housing project in Xiaoshan District, Hangzhou, Zhejiang Province, serves as a typical example, with a total construction area of approximately 12,000 square meters. It adopts a prefabricated concrete frame structure, achieving a prefabrication rate of 75%. The main components include prefabricated columns, composite beams, composite floor slabs, stairs, and external wall panels. There are two types of structures:

• Pure PC Structure: Fully prefabricated components are reliably connected to form an integral whole, suitable for multi-story residential buildings;
• Assembled Monolithic Structure: Prefabricated components are combined with cast-in-place parts to enhance structural integrity, commonly used in high-rise buildings.
  Additionally, Zhejiang Province promotes fully assembled rural houses, utilizing light steel structures or concrete shear wall structures to meet rural housing needs.

2. Standardized Construction Process
The construction process is divided into four stages:

• Preliminary Preparation (Days 1-15): Complete site leveling, temporary facility setup, and tower crane installation and commissioning to ensure construction conditions;
• Component Production (Days 16-75): Simultaneously carry out detailed design, mold making, steel bar processing, and concrete curing to ensure component quality;
• On-site Assembly (Days 61-150): Conduct sequential assembly by building, following the order of "foundation → prefabricated columns → prefabricated beams → composite slabs → stairs → external wall panels", with each floor cycle controlled within 5 days to improve efficiency;
• Mechanical and Electrical Installation and Decoration: Intersperse pipeline embedding, equipment installation, and interior and exterior wall decoration, culminating in final acceptance and delivery by five parties.

3. Technical Standards and Pilot Directions
Zhejiang Province is advancing pilot projects for assembled decoration, requiring the adoption of:

• Dry Construction Methods: Reduce wet operations to enhance construction speed;
• Integrated Prefabrication of Components: Such as integrated bathrooms and kitchens, to improve decoration quality;
• Separation of Pipelines and Structures: Facilitate future maintenance and upgrades.
  Pilot cities (such as Hangzhou) are required to initiate at least five new projects annually and participate in compiling technical standard atlases to promote industry standardization.

4. Policy Support and Management Mechanisms

• Policy Support: Fully assembled rural houses enjoy financial subsidies and housing loan support, reducing construction costs;
• Management Model: Adopt the EPC general contracting model, where design, construction, and component production units form a consortium to achieve integrated design-production-construction management;
• Resource Allocation: Allocate professional teams (such as project managers and technical leaders) and specialized equipment (such as tower cranes and grouting pumps) to ensure construction professionalism.

This plan integrates standardized processes, technical requirements, and policy orientations for prefabricated housing in Zhejiang Province, providing a scientific reference for practical design.