Jiyang Prefabricated Houses

The following are the policies, costs, and design points related to prefabricated houses in Jiyang:

Handling Methods for Prefabricated Panel Houses

According to the policies in 2026, the governance of prefabricated panel houses is divided into three categories:

1. Grade D Dilapidated Houses: Those identified as having failed load-bearing structures should, in principle, be completely demolished and included in the scope of urban renewal demolition. However, they must meet the constraints of "the demolished area not exceeding 20% of the current status" and "a demolition-to-construction ratio ≤ 2".
2. Grade C Dilapidated Houses: The focus is on repair and reinforcement. If the reinforcement cost is too high, an application can be made for "demolition and reconstruction on the original site", which means demolishing and then rebuilding at the original area and height.
3. Structurally Safe Houses: They follow the route of old community renovation and upgrading, focusing on renovating the facade, updating the pipeline network, installing elevators, etc., without involving demolition.

Cost of Prefabricated Components

The core cost of prefabricated buildings lies in the prefabricated components. According to the survey data from the Jiyang Housing and Urban-Rural Development Bureau in 2025:

• Prefabricated Floor Panels: The cost ranges from 800 to 1200 yuan per square meter. For a two-story residential building with an area of 100 square meters, the cost of the floor panels is approximately 80,000 to 120,000 yuan.
• Prefabricated Beams and Columns: The cost ranges from 1500 to 2000 yuan per square meter. For a residential building of the same area, the cost of the beams and columns is approximately 150,000 to 200,000 yuan.
• Impact on Total Cost: The prices of components are affected by factors such as materials (e.g., the strength grade of concrete) and design complexity (e.g., irregular components). In actual projects, detailed calculations need to be made in combination with the drawings.

Design Points for Prefabricated and Assembled Wall Panels

1. Core Principles:

   • Moisture and Weather Resistance: Waterproof sealant + tongue-and-groove joint design is used at the joints to prevent rainwater infiltration.
   • Load-Bearing Adaptation: For multi-story buildings, prefabricated concrete wall panels are commonly used, with a thickness of 100-150mm and a reinforcement ratio designed according to the C30 concrete standard.
   • Thermal Insulation and Energy Efficiency: In northern regions, thermal insulation layers such as polystyrene foam need to be embedded in the wall panels to meet the energy efficiency requirements for winter heating.

2. Structural Design:

   • Standardized Assembly: "Mortise-and-tenon" or "bolt connection" methods are adopted. Connection slots are reserved during prefabrication, and they are quickly fixed on-site through embedded parts to reduce wet operations.
   • Seismic Design: Steel trusses are added inside the wall panels to enhance crack resistance and adapt to seismic design requirements.

3. Material Selection:

   • Load-Bearing Walls: Concrete wall panels are preferred due to their high strength and good fire resistance.
   • Non-Load-Bearing Partition Walls: Lightweight partition panels (made of cement/gypsum base materials) are used, with a weight of 50-80kg per square meter. They can be directly plastered for decoration.
   • Integrated Wall Panels: Such as "thermal insulation and decoration integrated panels", which integrate the thermal insulation layer and the decorative surface. After installation, no secondary treatment is required, and the construction period is shortened by more than 30%.

Case Study: After adopting prefabricated assembled wall panels, the exterior wall of an office building in an industrial park in Jiyang with an area of 500 square meters only took 3 days to install (compared to 7 days for traditional processes). The surface flatness error was ≤ 2mm, construction dust was reduced by 80%, and construction waste was reduced by 60%.