Size Design of Prefabricated Panel Houses

The size design of prefabricated panel houses should closely align with the dimensions of the prefabricated panels while considering the specific requirements of the project to reasonably plan the house dimensions.

I. Determine the Basic Modulus of the House Based on Prefabricated Panel Dimensions
The length, width, and thickness of prefabricated panels are fundamental parameters for house design. In terms of length, common specifications include 2.4 meters, 3.0 meters, 3.6 meters, and 4.2 meters, with 4.2 meters being the standard maximum value; customization is required for lengths exceeding this. The width is primarily 0.5 meters or 0.6 meters, with special applications reaching up to 1.5 meters. For thickness, ordinary residential buildings commonly use 100mm to 150mm, while industrial buildings may exceed 200mm. During design, the bay (horizontal dimension) and depth (longitudinal dimension) of the house should ideally be integer multiples of the length of the prefabricated panels to minimize cutting waste. For example, if using 3.6-meter-long prefabricated panels, the house bay can be designed as 3.6 meters or its multiples (such as 7.2 meters) to avoid structural complications due to mismatched dimensions.

II. Optimize Design Parameters Based on Project Requirements
In addition to dimensions, house design must comprehensively consider factors such as load-bearing capacity and material type. For example, a two-and-a-half-story rural house with an area of 60 square meters requires a focused assessment of structural safety:

1. Load-Bearing Capacity: Determine the thickness of the prefabricated panels based on floor height and usage function (such as residential or storage). For the first floor of an ordinary residential building, a 120mm-thick panel can be used; for the second floor and above, if the load is heavier, it can be increased to 150mm.
2. Spatial Layout: For small houses, it is necessary to reasonably divide functional areas, such as adopting a layout of 'small bays + large depths' to utilize the length advantage of prefabricated panels and reduce the number of beams, thereby improving space utilization.
3. Waterproofing and Moisture Resistance: Strengthen waterproofing treatment at the joints of prefabricated panels, especially in wet areas such as bathrooms and kitchens. This can be achieved by adding a waterproof layer or adjusting the position of panel joints to prevent leakage.
4. Detail Decoration: The flatness of the prefabricated panel surface affects the decoration effect. During design, reserve the thickness of the decoration layer (such as adding 5mm to 10mm for tile installation) to ensure that the final floor height meets requirements.

III. Customized Design for Special Scenarios
If the house dimensions exceed the standard specifications of prefabricated panels (such as a bay requiring 5 meters), this can be achieved by customizing longer panels or combining different panel specifications. For example, a combination of a 4.2-meter panel and a 0.8-meter panel can be used, but the design of the connection nodes must be strengthened to ensure structural integrity. Additionally, industrial buildings, due to their heavy loads, require thicker prefabricated panels (such as over 200mm) and should be reinforced with steel beams or concrete columns to enhance load-bearing capacity.