【Daily Question】Utilities - Water Supply and Drainage - 20200307

Thread Content

This post was last edited by hesonchang214 on 2020-3-9 22:59. Among the following statements regarding the calculation of the roof area for rainwater collection in buildings, which one does not conform to the current \"Code for Design of Building Water Supply and Drainage\"? (   )   A. The runoff area of the roof should be calculated based on the horizontal projected area of the roof. B. When there is a vertical side wall that is higher than the roof surface, 1/2 of the area of that side wall should be counted as part of the runoff area. C. For the runoff area of the ramps at the entrances and exits of underground parking garages located near the building’s exterior walls, 1/2 of the area of those walls that are above the roof surface should be added to this area. D. For the runoff area of the podiums in high-rise buildings, 100% of the area of the side walls that are above the roof surface should be added to it. Answer: D. Options A, B, and C comply with the provisions of Article 4.9.7 of the current “Code for Design of Building Water Supply and Drainage”. Option D does not comply with the provisions of Article 4.9.7 of the current Code for Design of Building Water Supply and Drainage. For the catchment area of the podium of a high-rise building, 50% of the area of the side walls at its elevated portion should be added, rather than 100%