While not an NFPA issue many fire codes, BOCA for one, require if a building has multiple FDC's then all FDC's be interconnected so if you pump into one you charge all the systems in the building.
Except in some very large old underground systems I can't imagine anyting more then 1/2 HP being required.
I've never met an owner or occupant who would tolerate "visible leakage" that would be of such a quantity even a small jockey pump wouldn't be able to keep up with.
I wouldn't be...
>Since your situation satisfies 6.7.2.3, your system should not be required to satisfy NFPA 13.
Thing is almost any residential system, I design anyway, can handle the extra sprinkler as I usually "oversize" the "main" going down the corridor. On this particular job I could open seven heads in...
Let's see if this works.
K=150/(60^.5)
K=19.37
Q=19.37*(150^.5)
Q=237
I was afraid of that, unrealiable based on your readings but then with the angle valve it doesn't really surprise me. On a 2" angle valve the orifice opening on the seat is less then 1" from what I remember.
Change the...
I already know the answer to this but I am locking horns with one of the AHJ's and was wondering if anyone knows of a more definitive article somewhere.
I have a motel with corridors 5' wide x 150' long giving a compartment size of 750 sq. ft..
The corridor ceilings are smooth, flat and the...
LCREP,
I was thinking this morning of rigging up a 1 1/4" playpipe tip with 45 deg elbow and 2" nipples to give to our inspection department so they might conduct "flow test" of different systems during regular inspections.
It would be interesting to determine what the actual K-Factor's for...
I thought some of you might find this helpful.
The publisher of Sprinkler Tech Notes is Ken Isman, PE who is vice president of engineering at the National Fire Sprinkler Association and sits as a voting member on both the NFAP #13 AND #13R committees as an alternate to Russell Fleming.
In...
What TravisMack said again.
It's amazing what high humidity salt air can do for unprotected sprinkler pipe in Florida.
This should remain a locality issue.
Seems the less the AHJ's know the more dictatorial they become.
It's obvious it is not the intent of NFPA 13 to require sprinklers in these 12" depth display cases anymore then it is the intent to require sprinklers in the dish cupboards of the school cafeteria.
It's spotty at best but more AHJ's are catching on that it is a requirement.
You will find this inforced in many areas of South Carolina but not all.
System demand would be the demand developed in the hydraulic calculations for the particular occupancy and, depending on the occupancy, it may...
