Brad,
Don't forget to add a strainer

Gus Olson

-----Original Message-----
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org]
On Behalf Of Brad Casterline
Sent: Monday, September 19, 2016 11:30 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: spray bar versus deluge heads for opening protection

P = 40 PSI
K = 1.55
Q = 9.8 GPM

36 GPM / 9.8 = 3.67 holes per nozzle

call it 4 :)

Brad 

-----Original Message-----
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org]
On Behalf Of craig.pr...@ch2m.com
Sent: Monday, September 19, 2016 9:57 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: spray bar versus deluge heads for opening protection

Dude, you need serious help.   HAHA

Now how many average sprinkler designers could have figured that out?

But it has to equal the discharge of spray nozzles which are required to
provide a minimum of 36 gpm at 40 psi around the perimeter.



Craig L. Prahl
Fire Protection Group Lead/SME
CH2M
200 Verdae Blvd.
Greenville, SC  29607
Direct - 864.920.7540
Fax - 864.920.7129
CH2MHILL Extension  77540
craig.pr...@ch2m.com



-----Original Message-----
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org]
On Behalf Of Brad Casterline
Sent: Monday, September 19, 2016 10:37 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: spray bar versus deluge heads for opening protection [EXTERNAL]

(.25/24)^2 * PI = .000314 ft^2
assume coefficient of discharge of .9
.000314 *.9 = .000283

'imply' 7 PSI
7 / .433 = 16.167 (h)
v = (2gh)^.5 = 32.266 ft/sec

32.266 ft/sec * .000283 ft^3 = .00913 ft^3/sec, * 7.48 * 60 = 4.1 GPM

Q = 4.1
P = 7.0
K = 1.55

Brad

-----Original Message-----
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org]
On Behalf Of craig.pr...@ch2m.com
Sent: Monday, September 19, 2016 9:11 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: spray bar versus deluge heads for opening protection

Today's teaser.

An owner gives you this criteria for protecting a truck dock door opening.
A semi-trailer is parked at the opening up against the dock seal, the
trailer contains wooded pallets.

The rollup door and the trailer doors remain open at all times for in and
out access.

Their recommended method of protecting the opening is to use 1.5" pipe with
1/4" holes drilled every 6".  Provide this around the opening which is 12"
wide by 9' high.  This is approved by their international corporate safety
department.

This will be a deluge system for two dock doors.

How are you going to calculate this?


Craig L. Prahl
Fire Protection Group Lead/SME
CH2M
200 Verdae Blvd.
Greenville, SC  29607
Direct - 864.920.7540
Fax - 864.920.7129
CH2MHILL Extension  77540
craig.pr...@ch2m.com

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