Sprinklers below and ESFR above just like an office area. The mezzanine
is too big to be an obstruction (my opinion), too low to require ESFR's
and you can't omit sprinklers. The 15 ft. rule would be applied to the
full height warehouse and extend 15 ft. past the edge of the mezzanine.
Not an issue here unless you want to pull the ESFR's above the mezzanine
and do area density with control mode, but why?
Ron
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jimmy
Waite
Sent: Wednesday, September 19, 2007 2:32 PM
To: [email protected]
Subject: RE: Mezzanine/ ESFR
Ron, Thanks for your response. Can I ask your reasoning behind it?
Jimmy
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Fletcher,
Ron
Sent: Wednesday, September 19, 2007 2:45 PM
To: [email protected]
Subject: RE: Mezzanine/ ESFR
Forget the ESFR's. Just sprinkler the mezzanine.
Ron Fletcher
Aero Automatic
Phoenix, AZ
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jimmy
Waite
Sent: Wednesday, September 19, 2007 12:25 PM
To: [email protected]
Subject: Mezzanine/ ESFR
Hello all again,
Apparently the thing to do out west is to add mezzanines years after the
original building is built, and then sprinkle them after you get
caught/get in trouble. We have a job that is a warehouse designed with
and ESFR system. The owner has since come in and built a mezzanine.
The mezzanine is roughly 67' by 33.5' and is about 9'-10 tall. The
mezzanine is located on an exterior wall, and the warehouse is 30' tall
at the peak. There is no separation around the exterior of the
mezzanine.
Now that I have explained the space, let me explain the scenario. The
space under the mezzanine is used to pull orders. They keep the
merchandise in plastic totes while it is under the mezzanine. So all
the storage is transient. The totes sit in a flow through racks, to
hold orders before they go to a truck, that doesn't store above 5'.
Now to my question. Now the standard seems to be pretty clear, that
since there is no separation, the '07 in sections 11.1.2 (1) and 12.3
(1) say that since there is no separation the hazard needs to be carried
15'-0 beyond the hazard perimeter. Do these sections apply to both
above and below the mezzanine? Would I have to carry the ESFR design
criteria 15' into the mezzanine floor area? This seems a bit much
considering the space would normally be misc. storage in the'07. But I
also can see the justification to increase the design criteria since the
mezzanine is surrounded on three sides by storage.
If ESFR is required I know I'll have several problems. I won't have the
clearance needed between the deflector and storage. Also, the mezzanine
is non-combustible Obstructed construction. Would there be any other
design criteria I could use, other than ESFR?
I've never done an ESFR system before and definitely need the help. I
have pictures that could clarify what I'm talking about if anyone would
like them that I willing to give some suggestions.
Jimmy Waite
Burtell Fire Protection, Inc.
[EMAIL PROTECTED]
(406) 652-7697
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