NFPA 13 2022 regarding COIN sprinklers in non-combustible construction.

[SprinklerDesigner2]

This is something I have never run into before.

It's a jail and, as we would expect, it is non-combustible construction.

As we are not dealing with combustible construction I don't think we have to use COIN sprinklers in a tight non-combustible concealed space.

To be clear we have upright sprinklers in "chase" between the cells but this chase appears to not have a wall separating the chase from the cell that extends to the ceiling so we have the area above the cell and extends to the wall separating between two cells.

I've never run into something like this before.

 

[cdafd]

Are the sprinklers in the chases at the top of the roof line: deck?

Do the walls of the chases go to the roof deck??

Concerns

If sprinkler is at chase height wall level, may not activate

If no ceiling in chases,,, than the fire can spread to the roof line, and no sprinklers there. So either add chase ceiling or take chase walls to roof line, with sprinkler at roof line

Yes the jailers/ maintenance use it for storage.

 

[SprinklerDesigner2]

I have checked and it appears the wall separating the cells from the cells/chases extend to the roof line.

This is one of those jobs were looking at the drawings that I do have leaves me with a million questions.