Code for Design of Gas Fire Extinguishing System
GB50370-2005 excerpt
3.1.12 The protection height and radius of the nozzle shall comply with the following provisions:
1. The maximum protection height should not be greater than 6.5m;
2. The minimum protection height should not be less than 0.3 m;
3. When the installation height of the sprinkler is less than 1.5 m, the protection radius should not be greater than 4.5 m;
4. When the installation height of the sprinkler is not less than 1.5m, the protection radius should not be greater than 7.5m.
3.1.13 The sprinkler should be installed close to the top surface of the protection area, and the maximum distance from the top surface should not be greater than 0.5 m.
Installation of underfloor pipe network and sprinkler heads
Nozzle installation in the raised floor of the protection area
Installation of pipe network and sprinkler head under the roof