Room w/out ceiling, partial height walls, how to cover properly?
Room w/out ceiling, partial height walls, how to cover properly?
(OP)
Our design chief has run into a situation that we'd appreciate some advice on.
"A small mechanical room 6'-2" X 10'-2" w/ no ceiling & walls to 9'-6" aff. Concrete deck on concrete joists bot. @ 15'-7". Surrounded by corridors & rooms w/ ACT, or gyp. bd. ceilings, no combustibles above. Will an upright placed above each wall be enough to cover the area?"
I have attached an image of what he proposes.
Thank you,
Jon
LLAP
"A small mechanical room 6'-2" X 10'-2" w/ no ceiling & walls to 9'-6" aff. Concrete deck on concrete joists bot. @ 15'-7". Surrounded by corridors & rooms w/ ACT, or gyp. bd. ceilings, no combustibles above. Will an upright placed above each wall be enough to cover the area?"
I have attached an image of what he proposes.
Thank you,
Jon
LLAP





RE: Room w/out ceiling, partial height walls, how to cover properly?
why place the sprinklers above the walls that way if your intention is only to cover the electrical room?
I could not consider the above ceiling spaces of the other rooms as noncombustible compartments since they are completely open to the electrical space. In this situation I require the walls to extend to the structure above or I sprinkler the entire above ceiling space. I am puzzled by an electrical room not being enclosed and rated in general, what does the room contain?
RE: Room w/out ceiling, partial height walls, how to cover properly?
RE: Room w/out ceiling, partial height walls, how to cover properly?
If open only on 1 side, then there is an exception in NFPA 13 that allows you to do a multiplier of the long leg of the remote area. I believe the multiplier is 0.6 or something like that.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
RE: Room w/out ceiling, partial height walls, how to cover properly?
That is exactly what the engineer is claiming, that the ceiling constitutes the one side.
NFPA 13 2010 8.15.1.5
NFPA 13 2010 8.15.23
Is there a code in IBC, IFC, or NFPA we can give back to him to disprove his point?
The work is done in Des Moines, IA USA
Thank you,
Jon
RE: Room w/out ceiling, partial height walls, how to cover properly?
RE: Room w/out ceiling, partial height walls, how to cover properly?
sprinklers through out, unless section of 13 that exempts them
fire is not going to stop at the walls, it will spread up and out past that room walls that do not go to the deck
RE: Room w/out ceiling, partial height walls, how to cover properly?
RE: Room w/out ceiling, partial height walls, how to cover properly?
Will it activate at all or be a delay, because the heat is flowing into the other area adjacent to this room
RE: Room w/out ceiling, partial height walls, how to cover properly?
If the engineer was trying to claim the ceiling is one side, then he would still need to go about 24' into the space above the ceiling. But, it really doesn't matter, since that exception is not applicable in this scenario.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
RE: Room w/out ceiling, partial height walls, how to cover properly?
Jon