any floor with a building area of more than 1511m2 or a total building area of more than 3111m2 needs to be installed.

8.3.4 of Code for Fire Protection Design of Buildings, except for places that are not suitable for water protection or fire extinguishing, the following single-storey and multi-storey civil buildings or places should be equipped with automatic fire extinguishing systems, and automatic sprinkler systems should be adopted:

1, special-class and first-class theaters, theaters of other grades with more than 1,511 seats, auditoriums with more than 2,111 seats and auditoriums with more than 3,111 seats.

2. Exhibitions, shops, restaurants and hotels with a floor area of more than 1511m2 or a total floor area of more than 3111m2, as well as ward buildings, outpatient buildings and operating departments with the same building scale in hospitals;

3. An office building with a central air conditioning system and a total construction area of more than 3111m2;

4. Libraries with more than 511,111 books;

5. Large and medium-sized kindergartens and care facilities for the elderly;

6. Underground or semi-underground shops with a total construction area of more than 511m2;

7. Song and dance entertainment and entertainment venues (except swimming venues) located underground or semi-underground or on four or more floors above ground, and above ground song and dance entertainment and entertainment venues (except swimming venues) located on the first floor, the second floor and the third floor, with any floor construction area greater than 311m2.

extended data:?

Different spray head can be selected according to different places:

1, drooping spray head

The drooping spray head is the most widely used sprinkler, which is hung on the water supply branch pipe and sprinkles water in the shape of a throwing object, spraying 81-111% of the total water to the ground. Mainly used in places that do not need decoration, such as workshops, warehouses, parking garages, kitchens and other places.

2. The upright spray head

is suitable to be installed in places where there are many moving objects and it is prone to impact, such as warehouses, and it can also be concealed on the roof in the interlayer of the ceiling of the room to protect the ceiling top with more flammable materials.

The vertical spray head is vertically installed on the water supply branch pipe, and the sprinkler is in the form of throwing objects, which sprays 81 ~ 111% of the total water downwards, and some of it is sprayed to the ceiling.

3. Ordinary spray head

is suitable for restaurants, shops, warehouses, underground garages and other places. Ordinary sprinkler spray head can be installed directly or hung on the sprinkler pipe network, spraying 41%-61% of the total water downwards, and spraying a larger part to the ceiling.

4. Side wall type spray head

is suitable for places where it is difficult to lay pipes, and the side wall type sprinkler spray head is installed against the wall. It is mainly used in light dangerous parts of buildings such as offices, hallways, lounges and corridor rooms.

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