How Thick Are Concrete Prefabricated Houses
The thickness of concrete prefabricated houses varies depending on specific components and design requirements. Common prefabricated wall panel thickness is about 12 centimeters (120 millimeters), hollow slab thickness ranges from 110 to 240 millimeters, and prefabricated slab thickness is mostly 120 to 150 millimeters.
Thickness of Prefabricated Wall Panels
Prefabricated wall panels are the main load-bearing or enclosure components of concrete prefabricated houses, and their thickness is usually determined by structural forces, thermal insulation, and architectural functional requirements. The thickness of conventional prefabricated wall panels is about 120 millimeters. This size can meet the load-bearing needs of ordinary residences while also taking into account economy and construction convenience. If enhanced thermal insulation performance or greater load-bearing capacity is required, the wall panel thickness may increase to 150 to 200 millimeters. For example, in cold regions or high-rise buildings, thickening the wall panels can improve thermal performance or structural stability.
Thickness of Hollow Slabs
Hollow slabs reduce self-weight and save materials through their internal hollow structure, and their thickness mainly depends on the span (i.e., the distance between the two support points at the ends of the slab). For small spans (e.g., within 3 meters), the thickness of hollow slabs is mostly 110 to 150 millimeters, suitable for residential floor slabs or small industrial workshops; for large spans (e.g., 4 to 6 meters), the thickness needs to be increased to 180 to 240 millimeters to ensure structural stiffness and bending resistance. For example, a standard drawing set specifies that the thickness of a hollow slab with a span of 4.2 meters is 180 millimeters, and for a span of 6 meters, it needs to be 240 millimeters.
Thickness of Prefabricated Slabs
Prefabricated slabs usually refer to solid concrete floor slabs or roof slabs, and their thickness range is wide, but the common specification is 120 to 150 millimeters. This size can meet the load requirements of ordinary floors (e.g., residential live load of 2.0 kN/㎡) while also controlling material costs and structural self-weight. If used in commercial buildings or industrial workshops (with larger live loads), the thickness of prefabricated slabs may increase to 180 to 200 millimeters; for lightweight structures or temporary buildings, the thickness can be reduced to about 100 millimeters, but reinforcement with steel bars or composite materials is required to enhance performance.
Design Influencing Factors
The thickness design of various components of concrete prefabricated houses needs to comprehensively consider the following factors:
- Structural safety: Calculate the load-bearing capacity of slabs and walls according to load codes (such as the "Building Structural Load Code") to ensure that the thickness meets bending and shear requirements.
- Architectural functions: Sound insulation and fire protection requirements may require increasing the wall panel thickness; when space needs to be reserved for equipment pipeline installation, it may also affect the slab thickness design.
- Economy: On the premise of meeting performance requirements, standardized thicknesses are preferred to reduce mold costs and construction difficulty.
In actual projects, designers will determine the optimal thickness through structural calculations based on specific needs and code requirements, so the dimensions of prefabricated components may vary among different projects.
