The lobby of a nine-story hotel is three stories high. When doing fire protection design, the lobby is designed as an atrium.

That man is right, that is, pick it up according to the fire area. Generally, the fire zone of the lobby is zoned to the first floor, and the place where the second floor is connected with the lobby must be provided with fire shutters. But the specific floors should be connected according to the design intent. Because the shower pipe is connected from the first floor to the top of the lobby, it is difficult to handle and ugly from the decoration. So there is another way, which is to take over from the second floor, but the shower pipe in the lobby area has a separate water flow indicator, which means that it can be branched in front of the water flow indicator on the second floor, just like the main shower pipe on the second floor.