Travis, Based on the product listing, CPVC is appropriate.
Thank you, Bob Knight, CET III 208-318-3057 From: Sprinklerforum [mailto:[email protected]] On Behalf Of MFP Design, LLC Sent: Wednesday, August 08, 2018 9:57 AM To: [email protected] Subject: NFPA 13R - Garages - CPVC Good morning forum members. I would like to get your take on the concept below. We have a building that meets all criteria to be protected per NFPA 13R (2013 edition). These buildings have garages and dwelling units on the lower floor separated from the dwelling units by a common corridor. As such, these garages are not a separate building, but are accessible by more than one dwelling unit. This requires designing the garages per 7.2 – Areas outside the dwelling unit. Since garages are typically OH1, it is the intent to calculate these spaces with a density of 0.15. The spaces are ≤ 500 sq ft, so 7.2.2.1 allows us to limit the number of calculated sprinklers to all in a compartment to a maximum of 4. We are using QR sprinklers in these garages. Now, here is where the wrinkle comes. Are we permitted to use CPVC above the ceiling in these areas? The ceiling is double layered gyp board. NFPA 13R 5.2.2.2 states pipe or tube listed for light hazard shall be permitted where the room does not exceed 400 sq ft. I was always informed that you must consider the aggregate area for determining this 400 sq ft. Some of these garages are just over 400 sq ft. Others are ±300 sq ft. However, there are multiple garages side by side, so the aggregate is well over 400 sq ft. In this section, I would state that CPVC would not be an option above the garages. But, the listing of CPVC has a section for garages. It states that CPVC is permitted provided that: * Minimum protection of 3/8” gypsum * Listed sprinklers ≤225°F utilized * System shall be installed per NFPA 13R * CPVC pipe / fittings to be installed per manufacturer’s criteria. I am proposing that the piping be steel due to 5.2.2.2 but the builder is wanting CPVC and is stating it is possible by the CPVC listing noted above. The issue is that we have floor joists closely spaced and you can’t get steel going perpendicular to the floor joists up in the floor joist space. So, the builder will have to build a soffit where we run perpendicular to the floor joists. We can be up in the joist space running parallel. So, CPVC or steel? What is the forum consensus? MFP_logo_F Travis Mack, SET MFP Design, LLC 3356 E Vallejo Ct Gilbert, AZ 85298 480-505-9271 fax: 866-430-6107 <mailto:email:[email protected]> email:[email protected] <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.mfpdesign.com%2F&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=HJ8OA4xyeHAoxXNz5mu%2FYfycgtd5nsFrrpvzulZiNkQ%3D&reserved=0> http://www.mfpdesign.com <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.facebook.com%2Fpages%2FMFP-Design-LLC%2F92218417692&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=H%2BwdcgK8DLGBcNoqJEvUrzsXngySwkX56Vgf9gM9EGk%3D&reserved=0> https://www.facebook.com/pages/MFP-Design-LLC/92218417692 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> https://www.hightail.com/u/MFPDesign 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> https://www.linkedin.com/in/travismack “The bitterness of poor quality remains long after the sweetness of low price is forgotten.”
_______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
