How to Calculate the Square Meter Area of Prefabricated Houses

The calculation of the square meter area of prefabricated houses is mainly based on the structural type of the building and measurement specifications, with different calculation methods for different structural types of prefabricated houses. Details are as follows:

I. Single-story Prefabricated Houses The area calculation principle for single-story prefabricated houses is based on the sum of the horizontal projected areas of each floor above the plinth level of the exterior walls. For parts with a height of 2.20 meters or more, the full area is calculated, meaning that this part of the space reaches the conventional usable height in the vertical direction and can meet people's normal activity needs, so it is included in the total area according to the complete projected area. For parts with a height of less than 2.20 meters, half of the area is calculated, taking into account the limitations of this part of the space in the vertical direction, which cannot be fully equivalent to spaces of conventional height. When utilizing the space under a sloped roof, areas with a clear height of more than 2.10 meters are calculated as the full area because people can stand and move normally in this space at this height. Areas with a clear height between 1.20 meters and 2.10 meters are calculated as half of the area, as this height range allows for some limited activities or storage. Areas with a clear height of less than 1.20 meters are not included in the area calculation, as it is difficult for people to utilize the space normally at this height.

II. Multi-story Prefabricated Houses For multi-story prefabricated houses, the first floor is calculated based on the horizontal area of the structural perimeter above the plinth level of the exterior walls, and the second floor and above are calculated based on the horizontal area of the structural perimeter of the exterior walls. For floors with a height of 2.20 meters or more, the full area is calculated; for floors with a height of less than 2.20 meters, half of the area is calculated. Under sloped roofs and under stadium stands, if designed for utilization, areas with a clear height of more than 2.10 meters are calculated as the full area, areas with a clear height between 1.20 meters and 2.10 meters are calculated as half of the area, and areas that are not utilized or have an indoor clear height of less than 1.20 meters are not included in the area calculation. This is similar to the calculation rules for the space under the sloped roof of single-story prefabricated houses, as the area calculation method is determined based on the actual usability of the space.

III. Other Structural Types of Prefabricated Houses

1. Balconies: All are calculated as half of their horizontal projected area because balconies are usually attached spaces outside the building, and their usage functions differ from enclosed spaces.
2. Canopies: For canopies with a width from the outer edge of the structure to the outer edge of the exterior wall structure exceeding 2.10 meters, half of the horizontal projected area of the canopy structure board is calculated. Canopies with a width of less than 2.10 meters are generally not included in the area calculation, which is determined based on the actual coverage range of the canopy and its actual effect on the building.
3. Corridors: For corridors with permanent structures and columns, the full area is calculated based on the horizontal area of the column perimeter. For covered corridors without columns, half of the horizontal projected area of their structural floor is calculated. For uncovered corridors without columns, the building area is generally not calculated, which is divided based on the structural form and actual usage of the corridors.