Specifications of Precast Slabs for Rural Houses

The specifications of precast slabs for rural houses mainly include aspects such as span, width, thickness, and live load-bearing capacity:

Span (Length): The span range of precast slabs for rural houses is generally between 2 meters and 6 meters. For self-built rural houses, a common span of 2 - 3 meters is used to meet general living requirements. In cases of special needs, such as requiring a larger spatial span, precast slabs of 5 - 6 meters may be used. Additionally, there are some special lengths, such as 3800mm and 4000mm. The longest precast slabs for residential use are usually 4.2 meters, and they do not follow a modular pattern. If the length exceeds this, custom-made slabs are required. Generally, the length of ordinary slabs is designed according to a 300mm module, with common length specifications including 3000mm, 3300mm, 3600mm, 3900mm, and 4200mm.

Width: The width specifications of precast slabs are relatively concentrated, with 500mm and 600mm being the most common. At the same time, there are also some special cases. For example, four-hole precast slabs have a width of 400mm, and five-hole precast slabs have a width of 500mm. These precast slabs of different widths can be selected according to the actual layout and design requirements of rural houses.

Thickness: Common thicknesses of precast slabs are 120mm and 150mm. For ordinary residential houses, precast slabs should be at least 12 centimeters thick to ensure their basic load-bearing capacity and structural stability. If heavy objects, such as large furniture and equipment, need to be placed upstairs, it is advisable to directly choose precast slabs that are 15 centimeters thick to enhance the load-bearing capacity.

Live Load-Bearing Capacity: Precast slabs used in general residential houses are mainly divided into Class I and Class II slabs. Class I slabs can bear a live load of 1kn/m², suitable for ordinary living spaces with relatively low load requirements. Class II slabs can bear a live load of 2kn/m², able to meet the needs of areas with slightly higher load requirements. In the southwest region, it is stipulated that Class IV slabs, which can bear a live load of 4kn/m², should be used at a minimum to adapt to the special geographical environment and construction requirements of the area.