Types of Prefabricated Panels for Building Structures

Prefabricated panels for building structures are mainly classified into two categories based on shape and material, as detailed below:

Classification by Shape

1. Solid Prefabricated Panels
   These are cast as a whole with concrete, having no internal voids and a dense structure. Their key advantages include high load-bearing capacity, enabling them to withstand significant loads, and excellent sound insulation, effectively blocking sound transmission. However, they have drawbacks such as heavy weight, imposing higher demands on the overall building structure, high material consumption, and relatively higher costs.

2. Hollow Prefabricated Panels
   These feature regular voids inside, reducing self-weight by decreasing concrete usage. Their advantages include light weight, facilitating easy transportation and installation, and material savings, resulting in lower costs. However, they have poorer sound insulation and lower load-bearing capacity than solid panels due to the presence of voids, making them suitable for scenarios with low load requirements.

3. Channel-Shaped Prefabricated Panels
   These come in two types: positive channels (opening downward) and negative channels (opening upward). Positive channel panels have clear force distribution but require additional ceiling treatment due to their uneven bottom surface. Negative channel panels need to be filled with lightweight materials (such as foam) to balance forces, increasing construction steps but allowing direct decoration due to their flat bottom surface. Both types improve load-bearing efficiency by optimizing cross-sectional shapes but have higher construction complexity.

4. Ribbed Prefabricated Panels
   These panels have a ribbed structure, enhancing overall stiffness by adding ribs. They are suitable for large-span buildings (such as factories and warehouses), reducing the number of supporting structures and improving space utilization.

5. Sandwich Prefabricated Panels
   These are composite panels consisting of multiple layers, typically including concrete, insulation, and sound insulation layers. Their core function is to integrate insulation, sound insulation, and structural strength, making them suitable for buildings with high thermal performance requirements (such as residential buildings in northern regions), but they come at a higher cost.

Classification by Material

1. Steel Structure Prefabricated Panel Houses
   These use steel as the framework and prefabricated panels as the enclosure structure. Their advantages include light weight, facilitating rapid assembly and disassembly, and suitability for ocean transportation (such as temporary housing and post-disaster reconstruction), while meeting the structural strength requirements of high-rise buildings.

2. Concrete Prefabricated Panel Houses
   These adopt concrete prefabricated panels as the main structural or enclosure material, more closely resembling traditional living experiences and having high market acceptance in China. They offer excellent durability and fire resistance but have a heavy weight and require the use of reinforced concrete frameworks.

3. Wooden Prefabricated Panel Houses
   These use wood as the raw material, with characteristics not detailed in the reference information. They generally offer advantages such as fast construction speed and good environmental performance but require attention to moisture and fire protection treatments, making them suitable for low-rise residential buildings or tourist facilities.