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porte a cache help

porte a cache help

porte a cache help

(OP)
I know this is not a design forum

BUT

looking for any advice to sprinkler a 32 long by 22 wide porte cache and yes it has to be sprinkled.

Trying to find an alternative besides three lines of pendants???

any help??

RE: porte a cache help

2 lines of ex cov sprinklers smile  At least it is not 3 lines smile

Travis Mack
MFP Design, LLC
 

RE: porte a cache help

(OP)
TravisMack

I was wondering about that

can you tell me is there much difference on hydraulic requirements??

RE: porte a cache help

(OP)
my bad this is a """"vaulted""" porte a cache

RE: porte a cache help

What is the slope of the vault?

Travis Mack
MFP Design, LLC
 

RE: porte a cache help

How about limited combustible construction, ie. metal studs or fire retardant studs and plywood, meeting the definition of "limited combustible" in NFPA 13.

I assume you mean "porte couchere", I am not sure what a "porte a cache" is.

RE: porte a cache help

(OP)
firepe

yea one of them to

one problem is it is already built and trying to retro fit it made out of wood

RE: porte a cache help

(OP)
TravisMack

not really sure on slope maybe 4/12 at most???

RE: porte a cache help

Without digging through data sheets, and going off a fading memory, I believe that ex cov is only for flat (<2:12) ceilings.  As such, ex cov is not in order.  It seems like you may be stuck with std cov sprinklers.  As far as the concealed space, you may be able to get it with a single row of Tyco BB1 sprinklers.

If it is 22' wide, I am assuming the trusses span the 22' dimension.  Therefore, you would only need 2 branch lines at 11' apart (66" from each end).  You would then put 3 sprinklers on each branch line for the 32' dimension.  So, you only have 2 branch lines.  If you can hit the concealed space with the BB1 sprinklers, you have cut it down to a total of 3 lines for everything.  Again, verify before taking any of this to mean anything.

Assuming that this is subject to freezing, you should be small enough to go with a small anti-freeze system vs dry system.  Most of the contractors in the areas I deal with prefer to have a small area like this as antifreeze instead of a dry system.  (based on a previous thread, if the AF piping is >40 gal, make sure to do calculations using Darcy method instead of Hazen)

I hope this makes sense.

 

Travis Mack
MFP Design, LLC
 

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