How to Calculate Square Meters of Prefabricated Houses
The calculation of the square meterage of prefabricated houses is primarily based on the structural type of the building and measurement standards, with different calculation methods for different structural types. Details are as follows:
Single-story prefabricated houses: Calculate based on the sum of the horizontal projected areas above the exterior wall plinth. Among them, areas with a height of 2.20 meters or more are calculated as full area; areas with a height of less than 2.20 meters are calculated as half area. If the space under a sloped roof is utilized, further division is required based on the clear height: areas with a clear height exceeding 2.10 meters are calculated as full area; areas with a clear height between 1.20 meters and 2.10 meters are calculated as half area; areas with a clear height of less than 1.20 meters are not calculated. For example, if the horizontal projected area above the exterior wall plinth of a single-story prefabricated house is 100 square meters, with 80 square meters having a height of 2.5 meters and 20 square meters having a height of 2.0 meters, then the full-area portion is 80 square meters, the half-area portion is 20 × 0.5 = 10 square meters, and the total building area is 80 + 10 = 90 square meters.
Multi-story prefabricated houses: The first floor is calculated based on the horizontal area of the structural perimeter above the exterior wall plinth, and the second floor and above are calculated based on the horizontal area of the exterior wall structural perimeter. Floors with a height of 2.20 meters or more are calculated as full area; floors with a height of less than 2.20 meters are calculated as half area. 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 area; areas with a clear height between 1.20 meters and 2.10 meters are calculated as half area; areas not utilized or with an indoor clear height of less than 1.20 meters are not calculated. For example, for a two-story prefabricated house with a structural perimeter horizontal area of 120 square meters on the first floor and 100 square meters on the second floor with a height of 2.3 meters, the first floor is calculated as 120 square meters of full area, the second floor is calculated as 100 square meters of full area, and the total building area is 220 square meters.
Other structural prefabricated houses: Balconies are calculated as half of their horizontal projected area; for canopies where the width from the outer edge of the canopy structure to the outer edge of the exterior wall structure exceeds 2.10 meters, calculate as half of the horizontal projected area of the canopy structure board; for corridors, covered corridors with permanent structures are calculated as full area based on the horizontal area of the column perimeter, covered corridors without columns are calculated as half of the horizontal projected area of their structural floor, and uncovered corridors without columns are generally not calculated as building area.
