That would go down the rabbit hole of sprinklers in interstitial spaces and attics that would not be good on this project.
Travis Mack, CFPS, CWBSP, RME-G, SET Engineering Manager MFP Design 3356 E Vallejo Ct Gilbert, AZ 85298 NEW EXTENSION: 480-505-9271 ext. 700 NEW MOBILE: 480-272-2471 mailto:[email protected] www.mfpdesign.com Send large files to us via: https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.hightail.com%2Fu%2FMFPDesign&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=eGdMZGu2wXhUupGwgGTrqF3b54OP5%2BAZvlHhABSexWY%3D&reserved=0 LinkedIn: https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fin%2Ftravismack&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=tT5E7LsZjSmyreKi4gDCa70EWN%2BZodi%2FhbeCbHNRijI%3D&reserved=0 “The bitterness of poor quality remains long after the sweetness of low price is forgotten.” Need/Want a faster way to check material pricing? Build a material quote? Check availability ? Searching for an invoice? *If you do not already have an account with ferguson.com, click https://www.ferguson.com/account-registration to register.* **Have a Ferguson account? Download the Ferguson app for on-the-go access to your favorite ferguson.com features. http://fergusoncommunications.us.newsweaver.com/hq7bgesq7f/1qtklpp37l9byeftyuoy12/external?email=true&a=6&p=2591775&t=517003 or http://fergusoncommunications.us.newsweaver.com/hq7bgesq7f/n1gewi5ud95byeftyuoy12/external?email=true&a=6&p=2591775&t=517003** From: Sprinklerforum <[email protected]> On Behalf Of Sean.VanGaal via Sprinklerforum Sent: Thursday, November 12, 2020 9:45 AM To: [email protected] Cc: Sean.VanGaal <[email protected]> Subject: RE: Domestic Demands 13R I understand you said you are designed per 13R, but since you have a large lead-in of 4" have you tried to use "the more stringent 13 standard" that essentially says UG mains less than 4" that are for fire/domestic you have to calculate both unless you have a way to automatically isolate the non-fire. Implying 4" and larger it isn't a concern. You main spin down a rabbit hole of 13 vs 13R and cross applications. But it may be worth a shot. I am referencing from NFPA 13 (2016) http://24.1.3.3 Thanks, Sean VG -----Original Message----- From: Sprinklerforum <mailto:[email protected]> On Behalf Of Travis Mack via Sprinklerforum Sent: Thursday, November 12, 2020 9:34 AM To: mailto:[email protected] Cc: mailto:[email protected] Subject: [EXTERNAL] Domestic Demands 13R Forumites: Per 13R 9.6 it requires the domestic demand for the building being calculated to be added to the fire sprinkler system. This is generally not an issue. If you have a complex of say 20 buildings on site that is supplied by a common water line serving both domestic and fire, are you required to include the domestic demand for each building on the site water main. For example, if I have a project with a 8" main going through the complex, and 4" lead-ins to each building, with a domestic demand of 125 gpm for each building, how are you doing the domestic demand? With the domestic / fire split in the building, it is required to include the 125 gpm demand in addition to the fire sprinkler system demand in the 4" line. Are you including the other 2375 gpm (19 additional buildings at 125 gpm domestic allowance), in your calculations back to the city main? This seems quite excessive. If it were a 13 system, you would have similar flows and a 100 gpm hose allowance. There is no requirement in this example to include the domestic in a 13 system. But, if you are required to include the additional 2375 gpm, that could be quite taxing on the site supply. Again, how is everyone handling it. We have seen AHJ's take both approaches on this. Travis Mack, CFPS, CWBSP, RME-G, SET Engineering Manager MFP Design 3356 E Vallejo Ct Gilbert, AZ 85298 NEW EXTENSION: 480-505-9271 ext. 700 NEW MOBILE: 480-272-2471 mailto:[email protected] https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mfpdesign.com&d=DwIGaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=XSIweKhAHHhyB-d63TCLaTQ55VHpbhIhFOxEPFjbNpg&m=348IsxsBF8uKXpeHnDg47RrVPZk6iC4jNuYn6zyL0mw&s=7uwjM0eQIKu2lue1FfcGIs2B_Oq326_8ztpjp4Ye7rY&e= Send large files to us via: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.hightail.com_u_MFPDesign&d=DwIGaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=XSIweKhAHHhyB-d63TCLaTQ55VHpbhIhFOxEPFjbNpg&m=348IsxsBF8uKXpeHnDg47RrVPZk6iC4jNuYn6zyL0mw&s=cTm6DcAjr1HU4GBD_tjGOGDaMP1hM5aA3pmvr9PO-gM&e= LinkedIn: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.linkedin.com_in_travismack&d=DwIGaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=XSIweKhAHHhyB-d63TCLaTQ55VHpbhIhFOxEPFjbNpg&m=348IsxsBF8uKXpeHnDg47RrVPZk6iC4jNuYn6zyL0mw&s=X7LTfetz-zvSd0zYTZ6xXlzCiPPgMcH_L4K4TWun864&e= “The bitterness of poor quality remains long after the sweetness of low price is forgotten.” Need/Want a faster way to check material pricing? 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