[Sprinklerforum] Re: BFP on underground supply

I have just used the # / size of test header valves for a fire pump test to do the forward flow test capacity. I will use (1)2½” hose valve for up to 450 gpm (150% capacity of a 300 gpm pump), (2) 2½” hose valves for up to 750 gpm and (3) 2½” hose valves for up to 1000 gpm. I put these on a va

[Sprinklerforum] Re: Center vs Quad

When architects pose this question in a job meeting, I will say to them in the meeting. “Without looking up, does this building have sprinklers? Are they recessed or concealed? What color are they? If it does have sprinklers, are they in the center or quarter point of the tile?” When they say

[Sprinklerforum] Re: ESFR Addition

You could put a separate fire pump for each individual riser if you wanted. It would be astronomical in costs so not practical. But there is nothing stating you must boost all risers. Basically, you have some systems supplied by city water on the supply side of the pump and other systems on t

[Sprinklerforum] Re: Adding sprinklers to system with mixed SR/QR listing

No, all quick response sprinklers are fast response, but not all fast response are quick response. When we had this come up in the early 2000’s, I was directed by an AFSA informal interp to match the response elements. Again, in our case it was ESFR adjacent to EC sprinklers. The EC were 20x2

[Sprinklerforum] Re: Adding sprinklers to system with mixed SR/QR listing

The EC and QR both have fast response elements. Match the elements and you are good. That is what we were directed to do many years ago on a project that had EC and ESFR adjacent with no draft curtain separation. Please rate our customer service

[Sprinklerforum] Re: Gridded Dry systems

Brett: Actually back in late 70’s and likely early 80’s there was not a prohibition on it like there is now. So, since it was not prohibited, that would mean it was allowed. Please rate our customer service Trav

[Sprinklerforum] Re: [EXTERNAL] Hydrant flow tests

Maybe because I am in the SW with Steve, I agree 100% with his statements here. We can get situations modeled for basically anything we want regarding the water supply. As Steve mentioned, many water agencies have decades of data to accurately model this stuff. I have to ask why we will rely

[Sprinklerforum] Re: WFD In Pump Suction Line

Is there a way to do a pressure type flow switch and not a paddle type? Please rate our customer service Travis Mack, RME-G, COC, SET Senior Engineering Manager MFP Design 480-505-9271 ext. 700 C: 480-272-2471 travi

[Sprinklerforum] Re: Rooftop Deck with Pergola

I think it is 2019 or 2022 that talks about things like a trellis that can't trap heat should not need sprinklers. It is in the annex material. Try in Chapter 9 annex or handbook material. Hopefully they can see reason in that even though it is a newer edition than the adopted version. Pleas

[Sprinklerforum] Re: Adding standpipe in building with existing dry system

Is the building a high rise? If not, manual standpipes are permitted unless there is an amendment to the IFC and NFPA 14. Please rate our customer service Travis Mack, RME-G, COC, SET Senior Engineering Manager MF

[Sprinklerforum] Re: Non-combustible patio/balcony in 13R Type V construction

If type 5 I still put one out there. Travis Mack, CFPS, CWBSP, RME-G, COC, SET Senior Engineering Manager MFP Design 480-505-9271 ext. 700 C: 480-272-2471 travis.m...@mfpdesign.com www.mfpdesign.com Send large files to us via:

[Sprinklerforum] Re: Open attached corridor in 13R

Double check the building code. There is something in Chap 10 I believe about egress that has hung us up a few times on projects where it had to be protected. Please rate our customer service Travis Mack, CFPS, CW

[Sprinklerforum] Re: Sprinklers in duct - paintbooth

Thanks to all. I was able to locate the K8 Dry HSW. So that partially solves the issue. Thanks again. Please rate our customer service Travis Mack, CFPS, CWBSP, RME-G, COC, SET Senior Engineering Manager MFP Des

[Sprinklerforum] Sprinklers in duct - paintbooth

We have a project that has a paint booth requiring sprinkler protection at the exhaust duct at the top as it exits the roof. This has a 30 gpm flow requirement. The area is subject to freezing, so I need a dry sprinkler. We have always used K8 dry pendents in this application. I have a revie

[Sprinklerforum] Re: Metal Grating Clip for Fire Sprinkler Pipe Hanger

I have done projects where they had to do the same at those same facilities. It is unusual to hang for sure. Travis Mack, CFPS, CWBSP, RME-G, COC, SET Senior Engineering Manager MFP Design 480-505-9271 ext. 700 C: 480-272-2471 travis.m...@mfpdesign.com www.

[Sprinklerforum] Re: OH K?

Check the data sheet. I believe it is based on ceiling height as well. Travis Mack, CFPS, CWBSP, RME-G, COC, SET Senior Engineering Manager MFP Design 480-505-9271 ext. 700 C: 480-272-2471 travis.m...@mfpdesign.com www.mfpdesign.com

[Sprinklerforum] Re: [EXTERNAL] Re: Velocity - Rant

I just always like challenge people, like specifying engineers, who like to say “it used to be in the book. I know I have seen it.” I just ask them to please find any edition where NFPA 13 had velocity limits on piping systems. It is a long urban myth that “it was in the red book.” It has nev

[Sprinklerforum] Re: [EXTERNAL] Re: Velocity - Rant

This was the “why” that I got: We require a 10 psi margin for safety and to account for future degradation of water supply. The 14 fps insures that the piping will be larger and is an added layer of margin for future development. It wasn’t a fight the contractor wanted to go with since it was

[Sprinklerforum] Re: [EXTERNAL] Re: Velocity - Rant

I totally realize where all this comes from. It just amazes me at times, how long incorrect information and lack of understanding of things can remain in an industry. I always challenge anyone to show me in a copy of NFPA 13 anytime where it had velocity limits. I’ve checked back as far as th

[Sprinklerforum] Velocity - Rant

Does anyone have any idea where these engineers come up with the velocity limits? We have one that they are requiring a 10 PSI margin (not an issue since AHJ requires 20%), but also limiting velocity to FOURTEEN fps. There has never been a limit in NFPA 13. The velocity that we determine is o