New Type Prefabricated House Components

New type prefabricated house components refer to steel, wood, or concrete building components pre-made in factories or on construction sites, representing a significant achievement in the development of modern building industrialization.

I. Core Definitions and Classifications New type prefabricated house components decompose building structures into standardized units through industrial production methods, which are processed in factories and then transported to the site for assembly. They can be classified into three categories based on materials:

1. Steel Structure Prefabricated Components: These use profiled steel as the main frame, combined with bolts or welding connections, featuring light weight and fast construction. For example, a project in Zhejiang adopted profiled steel-concrete structural prefabricated components, enhancing structural strength through the synergy of steel and concrete, suitable for high-rise prefabricated buildings.
2. Concrete Prefabricated Components: These include prefabricated wall panels, floor slabs, stairs, etc., formed through mold casting. For instance, CMC combined modular buildings use steel-concrete integral casting technology, providing higher seismic performance for components and reducing construction time by 30% compared to traditional methods.
3. Wood Structure Prefabricated Components: These are mostly used in low-rise residences, utilizing engineered wood products (such as glued laminated timber and cross-laminated timber) to create beam-column systems, combined with bolt connections for rapid assembly.

II. Typical Technical Features

1. Modular Design: Mobile houses (prefabricated houses) divide buildings into independent modules, each integrating structural, mechanical, electrical, and decoration specialties. For example, a project in Zhejiang uses panel structural modules connected by mechanical bolts to form an integral structure, which can be assembled within a few hours after being transported to the site.
2. Performance Optimization: Prefabricated components generally adopt sandwich insulation design, embedding insulation materials between concrete layers to achieve structural and insulation integration. Some projects further enhance energy efficiency by setting up air layers or reflective films.
3. Connection Technology Innovation: Traditional prefabricated components rely on wet connections (such as on-site concrete pouring), while new components adopt dry connection technologies. For example, mechanical bolt connections enable rapid disassembly and assembly, facilitating later renovations; steel-concrete composite nodes use a combination of high-strength bolts and welding for both strength and construction efficiency.

III. Application Advantages

1. Improved Construction Efficiency: Factory prefabrication allows for parallel production of multiple processes, reducing wet operations on-site. Mobile house projects can be completed from foundation construction to occupancy in just a few weeks, shortening the construction period by more than 50% compared to traditional buildings.
2. Precise Quality Control: The factory environment eliminates weather interference, controlling component dimensional deviations within millimeters. For example, CMC modules achieve steel bar positioning accuracy of ±2mm through automated production lines, improving concrete strength uniformity by 15%.
3. Significant Environmental Benefits: Prefabricated component production reduces on-site construction waste by about 60%, and modular construction lowers noise pollution. A project in Zhejiang achieves resource recycling by using recycled construction waste to produce recycled aggregate concrete.
4. Strong Functional Adaptability: Prefabricated components can be flexibly combined to meet different needs. For example, medical buildings use detachable partition wall modules for rapid adjustment of department layouts; residential projects achieve building facade renovations by replacing exterior wall panels.