The basement of an apartment building has been divided up with plywood to create small (35ft^2) storage units for the residents. I'm wondering if those could be considered Closets and covered by NFPA 13 - 220.127.116.11?
Maybe I am missing something
What does the ceiling look like??
Smooth like sheetrock
Or wood stud
Should not matter
So I would ask the inspector nicely, what section of the fire code or 13 are you using, to not allow it??
As long as there is no storage within 18 inches, there is no problem
If the basement is already sprinkled, I would say no exception for the closets,
Let me provide more context, we did add sprinklers to the units...but the units were full so rather than getting them centered in the 7x5 rooms, they're like a foot into the room (i.e. 1' away from the close wall, and 6' away from the far wall and centered in the other/5' direction).
The inspector's talking about spray patterns at 18"/4' and being too far from the far wall, but 18.104.22.168 seems to say that on a "closet" that small, head location doesn't matter because everything is going to get wet...
7 ft by 5 ft room?
One sprinkler will cover that all day, no matter where you put it.
Even the standard sprinkler covers 7 ft 6 inches????Not sure where the inspector is coming from, unless he is concerned about storage with in 18 inches of the deflector??
Which is an enforcement problem, and not sprinkler design problem. If a closet has shelves, I like them to put the sprinkler in the middle, away from the shelves, to avoid obstructing it with storage.
So how are you connected with all this??? sprinkler co, GC, Owner, Other ????????
"unless he is concerned about storage with in 18 inches of the deflector"
That is it... He's saying "at 18" the spray pattern is only 4' from the head, so the back 2' of the room won't get sufficient water." He said a letter from our engineer saying everything would work would satisfy him...but it's an existing pipe schedule system, with the additional heads also installed by pipe schedule. Our engineer is hesitant to sign the letter, I'm trying to help him find some basis.
No shelves, just open 7x5 rooms.
Sprinkler Company. I installed the heads in the storage units, not the existing system. So my options are, find solid ground and convince the engineer to write a letter, replace the heads with vertical sidewalls, or have the customer empty every tenants storage unit out and go back and extend the piping into the center of the room.
I'd just replace the upright heads with vertical sidewalls, but of the 7x5' rooms, the 3' x 1' space above each doorway is open so technically it doesn't have backstop for the sidewall head. I haven't asked the inspector if he'd OK this yet.
"Maybe I am missing something"
Yeah, no, it's that simple. He's talking about spray patterns and half the water being "wasted" with the head not centered...and I'm saying yeah, but NFPA 13 allows 7'6" off the wall. But obviously I don't want to argue with him because that's not going to help...
It is wood joist ceilings.
I'm just going to go talk to the engineer again.
Being an ahj
I do not mind a good discussion, I have been wrong before.and learned also.
Ask him where in 13 does it support his call....
Plus show if the small room rule, where you can be nine feet off a wall.
I would and if he is not a one horse office, I would go to his boss.
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