Hose Valve Question

[bob smith]

So the local fire department told us that a building that we usually would not have any standpipes or hose valves needs them now. They came up with adding 5 hose valves per floor. There are 3 floors. Each floor will have a single riser that comes up and a main that runs to each hose valve. When we calculate a standpipe we usually have a single riser that goes up the stairwell with hose valves attached. But this is more like a tree system per floor running to individual hose valves. How would one calculate that? Does this make sense at all?

 

[UFT12]

See 7.10.1.1.2 & 7.10.1.2.2 of NFPA 14/19. Since you have only one standpipe, you need to calculate only 3 outlets x 250 gpm.

 

[cdafd]

Ask the nice ahj what they want from their hybrid system.