How to Calculate the Area of Prefabricated Houses

The calculation of the 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 to calculate the sum of the horizontal projected areas of all floors above the plinth on the exterior walls. For parts with a height of 2.20 meters or more, the full area is calculated; for parts with a height of less than 2.20 meters, half of the area is calculated. If the space under a sloped roof is utilized, the calculation method is determined according to the clear height: 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; areas with a clear height of less than 1.20 meters are not calculated. This calculation method fully considers the actual usable space of the building and ensures the rationality of area calculation.

II. Multi-story Prefabricated Houses The area calculation principle for multi-story prefabricated houses is to calculate the horizontal area enclosed by the exterior walls above the plinth for the first floor and the horizontal area enclosed by the exterior walls for the second floor and above. 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. For the space under a sloped roof and under the stands of a venue, if it is designed to be utilized, 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; if it is not utilized or the indoor clear height is less than 1.20 meters, the area is not calculated. This calculation method is similar to that of single-story prefabricated houses but places more emphasis on the independent calculation of each floor.

III. Other Structural Types of Prefabricated Houses

1. Balconies: The area calculation for balconies is relatively special, with half of the horizontal projected area being calculated. This regulation applies to all types of balconies, regardless of their shape or location.
2. Canopies: The area calculation for canopies is determined according to the width from the outer edge of the canopy structure to the outer edge of the exterior wall structure. If the width exceeds 2.10 meters, half of the horizontal projected area of the canopy structure slab is calculated; if the width is less than 2.10 meters, the area is not calculated.
3. Corridors: The area calculation for corridors is determined according to their structural type. For corridors with permanent columns, the full area is calculated according to the horizontal area enclosed by the columns; for corridors without columns but with a roof, half of the horizontal projected area of the structural floor is calculated; for corridors without columns and without a roof, the building area is generally not calculated.