Wall Thickness of Prefabricated Houses

The thickness of cement prefabricated panel walls in prefabricated houses generally ranges from 120 millimeters to 150 millimeters. The following provides an explanation from three aspects: material characteristics, structural types, and application scenarios:

Material Characteristics Determine Basic Thickness Range
Cement prefabricated panel walls use Portland cement as the binding material, with steel reinforcement bars inside serving as the framework. These are prefabricated into panel components using standardized molds. The compressive strength of the cement matrix and the tensile strength of the steel reinforcement jointly determine the load-bearing capacity of the wall. The thickness range of 120-150 millimeters can meet structural safety requirements while controlling material usage. Solid panels, lacking internal cavities, require increased thickness to enhance sound insulation and thermal insulation performance. Hollow panels, on the other hand, reduce self-weight while maintaining structural strength through internal cavity design. The thickness selection for hollow panels must balance cavity size with panel stability.

Structural Types Influence Thickness Selection
In early brick-and-mortar structures, prefabricated panel walls were mostly used as non-load-bearing partitions, with a thickness of 120 millimeters sufficient for space separation needs. This thickness also coordinated with the standard brick size (240 mm × 115 mm × 53 mm). In frame structures or prefabricated buildings, when prefabricated panel walls need to bear partial vertical loads, the thickness increases to 150 millimeters to enhance flexural rigidity. Additionally, in high-rise buildings where wind loads and seismic effects are significant, wall thickness may further increase, although such cases exceed the scope of conventional prefabricated houses.

Application Scenarios Constrain Thickness Parameters
In residential buildings, the thickness requirements for partition walls between households and between rooms differ: partition walls between households need to meet higher sound insulation standards (≥45 decibels), typically using 150-millimeter solid panels or composite constructions of double 120-millimeter panels; partition walls between rooms, primarily for space separation, can use 120-millimeter hollow panels to meet functional requirements. In public buildings, such as schools and hospitals, where fire resistance requirements are stringent, wall thickness must comply with the fire resistance limits specified in the "Code for Fire Protection Design of Buildings". This may be achieved by increasing the thickness of the concrete protective layer or using fire-resistant material wrappings, rather than simply increasing panel thickness.