12. High Buildings

12.1 Design Criteria

1. Sprinkler system for high buildings shall be hydraulically designed conforming to the requirements of this standard.

 
2. Sprinklers on each floor shall be supplied from separate connections from risers, as stipulated in (c).

 
3. Each connection from a riser shall be provided with a check valve, an indicating control valve, and a water flow detecting device with a time delay feature.

 
4. Listed pressure reducing valves shall be provided to limit the pressure to the sprinklers on any floor to 860 kPa. The pressure on the inlet side (riser side) of the pressure reducing valves shall not exceed 1200 kPa (See Appendix A).

 
5. Sprinkler systems at or below grade or in mercantile malls shall be supplied directly from the municipal water supply independently from sprinkler system serving that part of the building above grade.

 
6. In buildings over 85 m in height, sprinkler systems shall be zoned into approximately equal zones such that no individual zone exceeds 85 m in height.