Craig,
We want (need) to keep the tank size to a minimum. There are space
restrictions, plus heating is going to be an even greater burden than
it has been. The difference is 250K vs 450K (roughly). There will be
a dedicated line running from the pump house to each of the buildings
for the ceiling systems. Some of the buildings are existing and we
can use the existing sprinkler main for the rack riser. I have told
them that we need to develop a comprehensive plan for the entire
facility, but have not had any kind of a response yet.
Whether the owner is doing a cost analysis or not, I don't know. I'm
not party to that. This whole project started out as a design/build
to modify in-rack sprinklers to a new rack arrangement. When I looked
at the commodities, I flagged the problem. There is no insurance
company input, per the owners, and the company has no policies
regarding handling or storing flammables, except to meet local Code.
I have taken on the role of Engineer (and am being paid for it) to
review the commodities and make protection recommendations. The AHJ
is not that knowledgeable, so the State FM will probably be involved
before this is done.
How I spent my summer vacation..........
At 02:37 PM 5/13/2008, you wrote:
If you're going to provide a new tank and pump why not just include the
rack system in the demand and be done with it?
Are you going to have dual fire loops and run-ins, one to the rack riser
system and one to the overhead sprinkler systems?
Has anyone done a cost analysis on this proposal versus everything
coming off a bigger tank and pump set?
Duplicity can at times not only increase cost for installation but also
for on-going maintenance.
And ultimately it's up to the AHJ or Underwriter to offer an opinion if
it's outside of the normal realm of NFPA.
I'd also check for the owner's sake how the local water department bills
for sprinkler system tie-ins to the municipal water supply. Some charge
differently for a tank supply only versus a sprinkler system. This
could be another long term expense if tied into the municipal system
instead of the tank for the rack sprinklers.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.ch2m.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Todd
Williams - FPDC
Sent: Tuesday, May 13, 2008 7:15 AM
To: [email protected]
Subject: Split system
I am working on a chemical storage warehouse. The decision has been made
to protect it with sprinklers alone and not foam. The total water demand
for ceiling, in-rack and hose is around 3300 gpm. The public supply
alone cannot provide this volume. The proposal has been made to feed the
ceiling sprinklers from a pump and tank and the in-racks and hose from
the public. Hydraulically that can work. Is there any restriction or
problem with this type of arrangement? The only cross connection between
the tank and the public would be in the fill line. To me, this would be
a more reliable system that feeding the entire system from a single pump
and tank. This is the first of what could be 3 or 4 buildings protected
similarly.
While we are at it. This tank will be in the 200,000 gallon range. In
light of ever-increasing fuel prices, any good suggestions on decreasing
heating costs?
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email
to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
To Unsubscribe, send an email to:[EMAIL PROTECTED]
(Put the word unsubscribe in the subject field)
