Just want to know a little idea as to how many sprinkler heads can one i connect with a 4" dia line, 3" dia line, 2" dia line and so on. Would be great if someone could share it in a tabulated form, like making a table and putting different dia lines and sprinkler heads against each. I am after a small warehouse firefighting designing and intend to install a fire sprinkler system there. Thanks
Fire sprinkler design concept
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Chris
Well-Known Member
One would need a little more info for that. It all depends on pressure and doing a flow test on the main that the run will come off of. If you give me a little more info I can get you close to where you will need to be. First rule is if you have to guess then go with a larger diameter riser.
Fire sprinkler systems should be designed by an engineer trained and certified to design them.
Chris
Well-Known Member
Around here it is the fire sprinkler contractor that does the design and calculations. That being said I am not a sprinkler guy but I work closely with two.
Beni
Well-Known Member
Way back when NFPA 13 had a pipe schedule method like your looking for. But now a days everything is done by hydraulic calculations and software.
Also, warehouses are actually one of the more complex design issues in fire protection. You have to take into account of commodity classifications, height of storage, types of rack's, in rack sprinklers or not, and on and on. Generally the insurance underwriter will want a say so on this too. Even the type of sprinkler heads used effect the design pattern..
Any storage over 12 feet is high pile storage and life gets complicated. Now a days your not going to be able to get a fire marshal to sign off on a pipe schedule design for anything, let alone for a warehouse.
The last warehouse I designed had a density of 0.43 GPM/SF and it was pretty plain jane, no high hazard etc.. Some warehouses will be have an even higher density.
Also, warehouses are actually one of the more complex design issues in fire protection. You have to take into account of commodity classifications, height of storage, types of rack's, in rack sprinklers or not, and on and on. Generally the insurance underwriter will want a say so on this too. Even the type of sprinkler heads used effect the design pattern..
Any storage over 12 feet is high pile storage and life gets complicated. Now a days your not going to be able to get a fire marshal to sign off on a pipe schedule design for anything, let alone for a warehouse.
The last warehouse I designed had a density of 0.43 GPM/SF and it was pretty plain jane, no high hazard etc.. Some warehouses will be have an even higher density.
