According to Article 3.0.24 of Code for Calculation of Building Area of Building Engineering, roof water tanks, flower stands, arbor, terraces, open-air swimming pools, etc. None of them are counted.

In addition, there are other items in the specification that should not be calculated, including:

1, building entrance (arcade, street floor).

2. Interlayer of equipment and pipeline in the building.

3. Separate single-story rooms in the building, curtain hanging on the stage and backstage, overpass of scenery, platform picking, etc.

4. Operating platform, feeding platform, installation box and tank platform in the building.

5. Legs, wall posts, cribs, steps, wall plastering, decorative surfaces, brick plastering surfaces, decorative curtain walls, air conditioning frames (boxes), bay windows, components, accessories, awnings with a width of 2 2. 10/0m or less, decorative balconies unconnected with buildings, and galleries.

6. Overhead corridors, outdoor stairs and outdoor steel stairs and ladders are used for maintenance and fire fighting without permanent roofs.