How do I size the fire water storage tank for a high-rise building?
The fire water storage tank is sized according to the sprinkler or standpipe demand, whichever is larger for the water supply duration as stated in NFPA 13 table 11.2.3.1.2
How many sprinkler heads do I need to hydraulically calculate for a single family dwelling sprinkler system?
Maximum two residential heads shall be hydraulically calculated for the design criteria listed in section 10.2.1 of NFPA 13D.
When do I need to have a storage tank for fire protection?
Storage tanks for fire protection are required for new high-rise buildings over 75 ft. and for existing building falling under the scope of chapter 86 of LABC when the building height exceeds 150 ft.
When do I need to zone the sprinkler system?
The maximum pressure in the sprinkler system shall not exceeds 350 PSI at any location in the system. Sprinkler systems can be zoned to avoid exceeding such pressure.
When do I need floor control valves? Where should be located?
Floor control valves and waterflow detection assemblies shall be installed at each floor where any of the following occur:
- 1. Buildings where the floor level of the highest story is located more than 30 feet above the lowest level of fire department vehicle access
2. Buildings that are four or more stories in height
3. Buildings that are two or more stories below the highest level of fire department vehicle access
Can I install a master PRV downstream of the fire pump in a sprinkler system?
A master PRV is allowed to be installed downstream of a fire pump when a second master PRV is installed to provide redundancy, so that failure of one PRV does not affect the operation of the fire protection system.
What are the pressure and flow requirements at the standpipe hose valves?
The flow and pressure requirements are 250 GPM at 100 PSI when PRV is not required, and 250 GPM at 125 PSI when PRV is required.