Prefabricated Panels for Industrial Factory Building Roofs
Common types of prefabricated panels for industrial factory building roofs include Tianji panels (steel-frame lightweight panels) and general prefabricated panels, which differ in structure, function, parameters, and scope of application. The following is a detailed analysis:
Tianji Panels (Steel-Frame Lightweight Panels)
Their structure consists of a lightweight steel frame, high-strength anti-corrosion steel wire mesh, a BAS ultra-lightweight concrete core layer, and a flexible waterproof layer. Functionally, they possess multiple characteristics: their load-bearing capacity meets the needs of industrial factories; they have excellent thermal insulation performance, with a thermal conductivity coefficient of 0.07–0.08 W/(m·K), effectively reducing heat transfer; the waterproof layer design ensures no leakage on the roof; their fire resistance limit reaches 1.5 hours, meeting industrial building fire safety standards; their sound insulation effect is significant, reaching 40–50 dB, reducing noise interference within the factory; their explosion-relief function can release pressure under specific conditions, ensuring safety; and their seismic performance is suitable for earthquake-prone areas. In terms of parameters, the maximum span is up to 10 meters, the core material thickness is adjustable, the density is 680 kg/m³, the maximum operating temperature is 1000°C, and the design service life is 50 years. They have a wide range of applications and can be used for roof panels, floor panels, and wall panels in industrial and civil buildings such as industrial factories, large warehouses, and sports venues, and can be used in conjunction with concrete structures and steel structures.
General Prefabricated Panels
There are various types, including hollow prefabricated panels (with internal voids to reduce self-weight, suitable for residential floor panels and factory floors), solid prefabricated panels (without voids, with high strength, used for load-bearing wall panels or small-span floor panels), prestressed prefabricated panels (enhanced tensile strength through prestressed steel bars, suitable for large-span structures such as bridges and large factories), composite prefabricated panels (combining the advantages of prefabrication and cast-in-place, commonly used in high-rise buildings), and sandwich prefabricated panels (with an insulating layer such as polystyrene board in the middle, used for exterior walls, providing both insulation and load-bearing functions). In terms of design service life, prefabricated panels for ordinary residential and industrial buildings are 50 years, while important projects such as bridges can reach 70–100 years. The actual service life is affected by material quality, construction techniques, environmental conditions, and maintenance levels. High-quality cases can last 70–100 years with proper maintenance and mild environmental conditions, while poor-quality cases may severely deteriorate after 20–30 years in harsh environments or with insufficient maintenance.
