Specifications of Prefabricated House Slabs
The specifications of prefabricated house slabs mainly include four aspects: length, width, thickness, and live load-bearing capacity:
Length (Span): The length specifications of ordinary prefabricated slabs are quite diverse, with common options including 3000mm, 3300mm, 3600mm, 3900mm, and 4200mm. Among these, 4200mm is the most commonly used specification, capable of meeting the span requirements of most residential buildings. Additionally, there are prefabricated slabs with special lengths, such as 3800mm and 4000mm, with 3800mm being the most frequently used among special slabs. For residential prefabricated slabs, the maximum length is typically 4.2 meters. If a longer slab is required, it must be customized according to specific needs.
Width: The width specifications of prefabricated slabs mainly include three types: 400mm, 500mm, and 600mm. Among these, 400mm (with four holes) and 500mm (with five holes) are the most commonly used specifications, capable of meeting the layout requirements of different residential buildings. Prefabricated slabs with a width of 600mm are relatively less used but have their application value in certain specific situations.
Thickness: The thickness specifications of prefabricated slabs mainly include two types: 120mm and 150mm. Among these, 120mm is the standard thickness, suitable for the floor requirements of most residential buildings. However, if water pipes or electrical wires need to be embedded within the prefabricated slab, a slab with a thickness of at least 150mm must be selected to ensure sufficient space for wiring operations.
Live Load-Bearing Capacity: The live load-bearing capacity of prefabricated slabs is divided into four grades: Grade I, Grade II, Grade III, and Grade IV. Grade I slabs can withstand a live load of 1kN/m², Grade II slabs can withstand 2kN/m², Grade III slabs can withstand 3kN/m², and Grade IV slabs can withstand 4kN/m². In general housing, the use of Grade I and Grade II slabs is usually sufficient to meet demand. However, in specific regions such as the southwest, due to geological conditions or building code requirements, the use of Grade IV slabs is mandated as a minimum to ensure building safety.
