Qingyuan Prefabricated Component Assembled Housing

Qingyuan has developed a relatively comprehensive development system in the field of prefabricated component assembled housing (prefabricated buildings), covering policy promotion, technical characteristics, component applications, and corporate layouts.

Development Overview and Policy Objectives

Qingyuan City has continuously promoted the development of prefabricated buildings by issuing implementation opinions, optimizing implementation scopes, organizing training sessions, and studying advanced experiences to accelerate industrial implementation. In the first quarter of 2023, the newly started construction area of prefabricated buildings in the city reached 92,800 square meters, accounting for 6.15% of the total area of newly started projects; among them, government-invested projects accounted for 34.28%, indicating policy preference for public projects. Qingcheng District and Qingxin District have been explicitly required to have prefabricated buildings account for more than 30% of newly built structures by the end of 2025, with government-invested projects needing to exceed 50%, reflecting the mandatory objectives of long-term planning.

Building Model and Technical Advantages

Prefabricated buildings adopt a model of "standardized design, factory-based production, modular construction, integrated decoration, and information management," achieving "building-block" construction through on-site assembly of prefabricated components. Their core advantages include:

1. Efficiency Improvement: Construction speed is 30%-50% faster than traditional methods, with less restriction from climatic conditions;
2. Environmental Protection and Energy Efficiency: Reduces on-site wet operations, lowers dust and noise pollution, and increases material utilization by more than 20%;
3. Quality Control: Factory-based production eliminates human errors, with component precision reaching the millimeter level and higher structural safety;
4. Cost Optimization: Shortens construction duration by about 20%, saves labor costs, and reduces maintenance expenses throughout the life cycle by 15%.

Typical Component Application Cases

Prefabricated steel bar truss floor deck roof panels are widely used in Qingyuan. This component is connected by steel bar trusses and galvanized steel sheets through resistance spot welding, serving as formwork during construction and sharing loads with post-poured concrete during use. Its characteristics include:

• Reasonable Load-Bearing: The truss provides vertical support, while the steel sheet enhances shear resistance, ensuring stable load-bearing capacity;
• Convenient Construction: No formwork is required on-site, shortening the construction period by 40%, and the flat bottom formwork facilitates decoration;
• Comprehensive Consideration: The thickness of the galvanized steel sheet should be selected according to fire protection regulations, and the durability design should consider the thickness of the concrete cover.

Key Corporate Layouts

1. Shanghai Electric Kecheng (Yingde) Construction Technology Co., Ltd.: Qingyuan's first prefabricated building production base, investing 450 million yuan, with an annual production capacity of 150,000 cubic meters of prefabricated wall panels, composite floor slabs, and other components, covering the Guangdong-Hong Kong-Macao Greater Bay Area market;
2. Qingyuan Jiuxiao Construction Engineering Co., Ltd.: Specializes in steel structure and prefabricated component installation, with complete service capabilities from component transportation to on-site assembly.

Through policy guidance, technological iteration, and corporate collaboration, Qingyuan is gradually building an ecosystem for the entire prefabricated building industry chain, providing replicable practical samples for the transformation to green buildings.