How to Calculate the Square of Prefabricated Houses

The calculation of the square footage of prefabricated houses is primarily based on the structural type of the building and measurement standards, with different calculation methods for different structural types of prefabricated houses.

Single-story prefabricated houses: Calculate the sum of the horizontal projected areas above the plinth of the exterior walls for each floor. For parts with a height of 2.20 meters or more, calculate the full area; for parts with a height of less than 2.20 meters, calculate half of the area. If the space under a sloped roof is utilized, the area calculation method should be determined based on the clear height: areas with a clear height exceeding 2.10 meters are calculated as full areas; areas with a clear height between 1.20 meters and 2.10 meters are calculated as half areas; areas with a clear height of less than 1.20 meters are not included in the calculation.

Multi-story prefabricated houses: The ground floor is calculated based on the horizontal area of the structural perimeter above the plinth of the exterior walls, while the second floor and above are calculated based on the horizontal area of the structural perimeter of the exterior walls. Floors with a height of 2.20 meters or more are calculated as full areas; floors with a height of less than 2.20 meters are calculated as half areas. For spaces under sloped roofs and under stadium stands, if designed for utilization, areas with a clear height exceeding 2.10 meters are calculated as full areas; areas with a clear height between 1.20 meters and 2.10 meters are calculated as half areas; areas that are not utilized or have an indoor clear height of less than 1.20 meters are not included in the calculation.

Other structural types of prefabricated houses:

• Balconies: Regardless of the balcony type, calculate half of the horizontal projected area.
• Canopies: For canopies where the width from the outer edge of the structure to the outer edge of the exterior wall structure exceeds 2.10 meters, calculate half of the horizontal projected area of the canopy structure slab; canopies with a width of less than 2.10 meters are not included in the calculation.
• Corridors: For permanent structured corridors with columns, calculate the full area based on the horizontal area of the column perimeter; for covered corridors without columns, calculate half of the horizontal projected area of the structural floor slab; for uncovered corridors without columns, generally do not include the area in the calculation.

It should be noted that the calculation of the area of prefabricated houses must strictly adhere to measurement standards to ensure data accuracy. In actual calculations, the areas of each part should be classified and statistically analyzed based on the specific structural type and design drawings, and finally summarized to obtain the total building area.