Differences between Tree, Gridded and Looped systeme
Differences between Tree, Gridded and Looped systeme
(OP)
hy every body and thank's for all your answers that you give me befor.
My question for now is what are the differences between Tree, Gridded and Looped systemme, not how to distinghuish them ,because I know that, but how to choose between this three systemes in a given area?
is there any advantages or disadvantages to choose one or the other?
My question for now is what are the differences between Tree, Gridded and Looped systemme, not how to distinghuish them ,because I know that, but how to choose between this three systemes in a given area?
is there any advantages or disadvantages to choose one or the other?





RE: Differences between Tree, Gridded and Looped systeme
Before you cost someone money or a building burns down
RE: Differences between Tree, Gridded and Looped systeme
Not many contractors are using loops (in my experience). The advantage is not much and it takes a bit of skill and labour to get the two ends of the loop to meet up properly.
I live and work in Dubai now and this place is full of people designing sprinkler systems who don't have the appropriate skills and knowledge and simply wouldn't be employable in the US. Maybe Morocco is the same.
Anyway you should check out Amazon.com and get yourself a book on sprinkler design.
RE: Differences between Tree, Gridded and Looped systeme
what I understand is that the big difference is at the installation of the system.
As you expected, it's the same thing here in Morroco, there are no professionals in sprinkler systeme. For me I am in training and I face a lot of broblems in understanding NFPA13 because my boss that wokr for some years in the field of automatic sprinkler systeme don't know big things, so I start from zero with no help, and no one in the company knows something about sprinklers.
I have the NFPA 13 and another book called "Desing and layout Fire Sprinkler System" it's pretty good for beginners but don't get to details and similarity that we face in the NFPA13.
RE: Differences between Tree, Gridded and Looped systeme
Do you have a web page or something where I can get an email?
Emails themselves are frowned on.
RE: Differences between Tree, Gridded and Looped systeme
RE: Differences between Tree, Gridded and Looped systeme
This is mine yassine.mzili@gmail.com
RE: Differences between Tree, Gridded and Looped systeme
Gridded systems allow the water multiple pathways through the system to the operating sprinklers. This means the water travels slower, and we know friction loss increases as the velocity increases, so if a grid reduces the velocity of the water, there is less psi lost due to friction. This lets you reduce the pipe size of the lines. This system is used in retail/commercial spaces, warehouses mand sometimes residential. It works really well hydraulically, and makes tenant improvement projects much easier and faster (cost effective).
Gridded systems shall not be used for dry pipe systems. Now the slow moving air will not leave the system fast enough to trip the dry valve. So dry systems will be Tree, or Looped systems. While looping a system almost always improves the hydraulics, sometimes it is not possible, or just not necessary (small systems, or systems with good water pressure).
With experience you will know which to use when, and why.
Superior Fire Protection Systems
Protectiong Lives and Property since 1986.
Vancouver, British Columbia
http://www.superiorfireprotection.ca
RE: Differences between Tree, Gridded and Looped systeme
If you use a grid, don't forget the pressure relief valve!
The book written by Robert Gagnon is a great starter to learn from. http://w
RE: Differences between Tree, Gridded and Looped systeme
RE: Differences between Tree, Gridded and Looped systeme
>>If you use a grid, don't forget the pressure relief valve!<<
Yep, and the 2010 version of 13 requires a relief valve for all wet systems of any type.
Real world knowledge doesn't fall out of the sky on a parachute, but rather is gained in small increments during moments of panic or curiosity.