And to add on to what Steve noted - there are always four considerations
- at least - when protecting storage. The ones I use:
1. What is being stored?
* If it's plastic, is it in cartons or exposed?
2. How is it being stored? Racks? (single, double, multiple?) Pallets?
Shelf?
* Is it encapsulated? Not really an issue when protecting
plastics however.
3. How high is the intended/possible storage?
4. How high is the ceiling above the top of the storage?
There are any number of other considerations such as roof slope. Until
you have all that data any approach in protecting storage is incomplete.
Also, I looked into chapter 17 for storage of plastics up to 25' in
racks, and I didn't find one which had a remote area of 2,500 ft² and a
density of 0.45. Where did you come up with 0.45/2500?
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit the website <http://www.parsleyconsulting.com/> ***
On 09/12/2019 8:12 AM, Steve Leyton via Sprinklerforum wrote:
Do you know how to do a flow rate projection from a two point flow
test? I figure that with overflow your .45/2500 will require 1250 GPM
+ 500 GPM hose, yes? At 1750 GPM your flow test projects to a
residual pressure of 22-23 PSI, so you don’t need a tank but you do
need a pump.
Steve L.
*From:*Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*Brian Harris via Sprinklerforum
*Sent:* Thursday, September 12, 2019 8:08 AM
*To:* [email protected]
*Cc:* Brian Harris
*Subject:* Pump? Or Pump & Tank?
An insurance adjuster is telling a local packaging plant they need to
update their current sprinkler system to meet the higher demands of
product they are now storing. Adjuster is classifying everything as
Unexpanded Group A plastics, on racks, max 25’ storage, max 30’
ceilings. One option allows .45/2500 + 500 hose using 11.2K heads.
Running some quick numbers I’m around 1850 GPM @ 65 PSI. The latest
flow test is only 84 Static, 60 Residual @ 1010 GPM. They’ve been told
their gonna need a pump, I’m thinking they need more water as well.
Thoughts?
*Brian Harris, CET*
BVS Systems Inc.
Design Manager
bvssystemsinc.com <http://bvssystemsinc.com/>
Phone: 704.896.9989
Fax: 704.896.1935
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