Specifications of Prefabricated House Roof Panels
The specifications of prefabricated house roof panels (prefabricated slabs) mainly include four aspects: length, width, thickness, and live load-bearing capacity grade, as detailed below:
In terms of length (span), the length specifications of ordinary slabs are quite diverse, with common options including 3000mm, 3300mm, 3600mm, 3900mm, and 4200mm. These specifications can meet the needs of most residential and general buildings. Additionally, there are special slab length specifications, including 3800mm and 4000mm, to accommodate specific scenarios. It is worth noting that the maximum length of prefabricated slabs for residential use is typically 4.2 meters. If the length exceeds this, customization is required based on specific needs.
Regarding width specifications, prefabricated house roof panels mainly come in three sizes: 400mm, 500mm, and 600mm. Among them, 400mm-wide prefabricated slabs are usually designed with a four-hole structure, while 500mm-wide slabs have a five-hole structure. These two specifications are the most commonly used in practical applications. Although 600mm-wide prefabricated slabs are relatively less used, they still have application value in certain specific situations.
In terms of thickness, the commonly used thicknesses for prefabricated house roof panels are 120mm and 150mm. For general residential buildings, a thickness of 120mm is sufficient to meet basic load-bearing requirements. However, if water pipes or electrical wires need to be embedded within the prefabricated slabs, it is recommended to choose a thickness of at least 150mm to ensure sufficient space for pipeline layout and avoid affecting the structural strength of the slabs.
The live load-bearing capacity grade is an important indicator for measuring the load-bearing capacity of prefabricated house roof panels. Based on different live loads, prefabricated slabs can be classified into four grades: Grade I to Grade IV. Grade I slabs can bear a live load of 1kN/m², Grade II slabs can bear 2kN/m², Grade III slabs can bear 3kN/m², and Grade IV slabs can bear 4kN/m². In general housing, the use of Grade I and Grade II slabs is sufficient to meet daily needs. However, in specific regions such as the southwest, due to factors such as geological or climatic conditions, it is stipulated that a minimum of Grade IV slabs must be used to ensure the safety and stability of the building.
