Amen to brother Steve's comments. The NFPA 14 second draft meetings last week were full of discussions. Steve's comments about "interviewing" the responding fire department about their needs and capabilities is critical.
*The above is my opinion and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the **AFSA, and/or NFPA or its technical committees.**AFSA cannot provide design or consulting engineering services, and this opinion should therefore not be considered, nor relied upon, as such.* Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org <https://www.facebook.com/firesprinkler.org/> <https://twitter.com/afsa/status/1039528345367732224> <https://www.linkedin.com/company/american-fire-sprinkler-association-afsa-/> <https://www.instagram.com/firesprinklerorg/> *Our members are at the heart of everything we do.* *There’s a lot more to ITM than the standard.* AFSA’s three-day, hands-on course is a review of the ITM requirements for various fire protection systems and components. It’s designed for technicians with at least one year of relevant work experience. Learn more <https://www.firesprinkler.org/programs/nfpa-25-hands-on-itm/>. On Wed, May 25, 2022 at 12:18 PM Steve Leyton <[email protected]> wrote: > Theoretically that’s true, but for a building under 75’, even volunteer > departments have adequate pumping capacity to make the standpipe work at > the top-most connections. > > > > Remember that the prescriptive pressures may be inadequate for some FD > standpipe kits and way more than adequate for others. If a department > uses small (1½” or 1¾”) hose packs for attack, you might need 125 PSI or > more at the hose connection to make it work, depending on make/model of > nozzle at the tip. If the attack line is 2½” + sections of 2” with a > smooth bore nozzle, you might only need 55-60 PSI at the hose > connection. It’s incumbent on the FD to know what their equipment can > pump and harmonize their operational strategies and equipment to the limits > of their capabilities. > > > > We generally talk about zones beyond the capacity to pump in terms of very > tall buildings. (Sidebar, this was a REALLY big topic of discussion at > the 2nd Draft meeting last week.) So theoretically, an under-resourced > brigade or department could have very limited pumping capability, but if > they’re using large diameter hose and fixed bore nozzles, it never > manifests. All of this adds up to one incredibly important step in the > design process; I’ve been harping on it for years and now it’s actually > codified. If you are not already familiar with the practices and policies > of the serving fire department in a particular area, consult with them to > affirm what pressure they want to pump and what pressure they need at the > remote hose connection, especially if it’s outside of the prescriptive > design criteria in NFPA 14. > > > > > > The foregoing is my opinion only and does not represent NFPA or the NFPA > 14 Technical Committee, nor intended to serve as an interpretation of the > standard. > > > > *Protection Design and Consulting* > > Steve Leyton, President > > T *|* 619.255.8964 x 102 *| * > *www.protectiondesign.com <http://www.protectiondesign.com/> *2851 Camino > Del Rio South *|* Suite 210 *|* San Diego, CA 92108 > Fire Protection System Design *|* Consulting *|* Planning *|* Training > > > > > > > > > > > > > > *From:* Prahl, Craig/GVL <[email protected]> > *Sent:* Wednesday, May 25, 2022 7:52 AM > *To:* Brian Harris <[email protected]>; > [email protected] > *Subject:* [Sprinklerforum] Re: Manual Standpipes > > > > Its requirements can’t exceed the capabilities of the local fire > department apparatus. > > > > Craig Prahl | Jacobs | Group Lead/SME – Fire Protection | > [email protected] | www.jacobs.com > > 1041 East Butler Road Greenville, South Carolina 29606 > > CONTACT BY: email or MS TEAMS > > > > > > > > *From:* Brian Harris <[email protected]> > *Sent:* Wednesday, May 25, 2022 10:45 AM > *To:* [email protected] > *Subject:* [EXTERNAL] [Sprinklerforum] Manual Standpipes > > > > Other than the flow & pressure requirements for the top connections are > there any limitations (number of stories) for a manual standpipe? > > > > *Brian Harris, CET* > > BVS Systems Inc. > > Design Manager > > bvssystemsinc.com > <https://urldefense.com/v3/__http:/bvssystemsinc.com/__;!!B5cixuoO7ltTeg!CpY_P9C1_iLeDruwIujHdk-1dSbrW_DKBvf68tPGXaStBHsFXHEd88vJsMdjolkUZwIPqwBBa7KOidBiVOabtDb0$> > > Phone: 704.896.9989 > > Fax: 704.896.1935 > > > > > ------------------------------ > > > NOTICE - This communication may contain confidential and privileged > information that is for the sole use of the intended recipient. Any > viewing, copying or distribution of, or reliance on this message by > unintended recipients is strictly prohibited. If you have received this > message in error, please notify us immediately by replying to the message > and deleting it from your computer. > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected]
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