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I looked at a church with the same situation yesterday. And it has $120,000usd of paintings applied to all the walls. Sprinklers could do more harm than good. I think I am going to suggest an alternate equivalent system as allowed by NFPA 13. I am thinking of a couple of options: 1...

Colorado requires 10% up to 100 psi and 10 psi over 100 psi. It is pretty good. I still see a lot of people (designers and ahj's) who adjust the tested flow as well as the pressure - telling me they really don't understand what they are looking at, or how it works. I wish I had enough money...

And heat tracing needs to be monitored.

Often uprights allow more flexibility in branchline elevation. If the deflector has to be 1" to 12" below deck, you have the whole 11" to work with, whereas with a pendant, you have to fit the pipe, the fitting, and the rest of the sprinkler in the space above.

Generally, the applicable standards are NFPA 20, "Standard for the Installation of Stationary Pumps for Fire Protection" and NFPA 25, "Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems" Your local standards, or those of your insurance company, may be...

You need to copy the same number of cells into the table. You can't copy 100 cells into a table with 90 cells. Your post seemed to confuse rows and columns. In your post you talk about a row of numbers, but your post shows a column of numbers. Do you need to transpose from column to row or...

The coefficient of discharge is really a factor that is used to determine the discharge of water from an outlet based on the velocity pressure measured at middle of the water stream, or from the highest velocity in the stream. Over 10 psi the turbulance on the hydrant steamer outlet is too high...

You do not want to add a water stream to hot bitumen, so a hydrant mounted monitor from a distance is not a good answer. Nearby hydrants on the roof may be helpful for fire fighting, but the only application of water should be by mist or fog. For a large tank, a compatible foam could be...

Your question is not clear. Either you are asking whether it is normal practice to remove systems, or you are asking whether it is normal practice to have CO2 systems within a MCC "system". Normal practice is to maintain fire suppression systems, not remove them. If you are asking whether it...

I am putting this out for discussion: Yesterday I visited a site. The fire sprinkler system was installed in 1970, 6" riser with a flanged check and OS&Y, all screwed sch 40 pipe. The system riser reduces to 4" after the FDC tee, and has a 4" flow switch. The issue is that there are 3...

There are pressure maintenance pumps in service. They are installed parallel to the system supply, and do not affect system operation. They used to be used to boost the system pressure downstream of the system check valve. Their purpose was to maintain system pressure higher than a...

Yes, 8.15.1.2.2 (above) is the reason it does not require sprinklers, as long as the air handling unit is not fuel-fired. Then you run into the problem of "not permitting occupancy or storage of combustibles"

I would think that calling the engineer and pointing out an obvious problem would be better than designing something wrong, just because it was shown that way on bid documents. It would be better for the customer, because if you knowingly design something wrong and report it as wrong, you are...

FM has tested ESFR's for aerosols. They also allow them for use on expanded group A plastics, not compartmented. NFPA 13 just states "outside the scope of this standard," which didn't help with foam meat trays stored to 22' high on pallets in standard racks. FM's guidelines - revised in...

OK, if you are brainstorming: How about a combination of ESFR and high expansion foam generators? ESFRs provide the quick response and massive amount of water, and the generators provide the blanket of foam to combat the floating combustible liquids. 810 gallons is not much foam. Hangers we...

I would submit a bid per plans and specs, the provide an alternate price adder to meet code. That way they will at least look at my number and possibly give me a call. I have found that GC's don't like suprises, and that they expect us to be their fire protection experts. Many jobs have...

I hope that none of the firefighters were injured. If so, I think that whoever made the decision to disable the sprinkler system should get some time behind bars. That is a great post Stookey.

Man, I hit the back button twice after replying and lost my post. Now I am copying this from Word. The amount of water that Akupikree is referring to is more than most sprinkler designers deal with. He needs to reduce the flow from 5,280 GPM to 4,400 gpm. The velocity on a deluge system of...

It depends on the type of unit. Generally, if they are not fuel fired units, you do not provide sprinklers in the ceiling space. If they are fuel fired units - they are a source of fuel and a source of heat. Gotta get sprinklers up there then. Some units are designed for, and are safe for...

NJ1 Doors are opened and left open often. I don't know where you are, but the crime rate must be high. Recently we modified systems at an occupied meat processing plant. Trucks back trailers up to the door and leave them. Then someone opens the door on the inside and they leave it open for...