Gentlemen Another thing to look at is the height of the building above the storage, this height wasnt mentioned in the original post and may not be an issue but should be looked at, See NFPA 13-12.1.3.4 Clearance to ceiling. Specific to your commodity would be section 12.1.3.4.4 -12.1.3.4.5
12.1.3.4.4 Where the clearance to ceiling exceeds 20 ft (6.1 m) for Section 16.2, protection shall be based upon the storage height that would result in a clearance to ceiling of 20 ft (6.1 m) or providing one level of supplemental, quick-response in-rack sprinklers located directly below the top tier of storage and at every flue space intersection. 12.1.3.4.5 Where the clearance to ceiling exceeds 10 ft(3.0 m) for Section 16.3 or Section 17.2, protection shall be based upon the storage height that would result in a clearance to ceiling of 10 ft (3.0 m) or providing one level of supplemen-tal, quick-response in-rack sprinklers located directly below the top tier of storage and at every flue space intersection. This is often overlooked by many designers and can really mess up your proposed design density and area of application. Anthony Carrizosa Project Manager | Fire Protection 7855 S 206th St Kent, WA 98032 Cell: 206-679-5283 | Office: 253-872-7222 <https://archerconstruction.com/> https://archerconstruction.com From: Brian Harris <[email protected]> Sent: Wednesday, January 29, 2020 8:31 AM To: [email protected] Subject: RE: Misc. Storage Ken- Thank you sir, havent talked to you in a while. Much appreciate your insight and clarity as always. If EH kicks in looks like (2) Risers . Brian Harris, CET BVS Systems Inc. bvssytemsinc.com <http://bvssystemsinc.com/> From: Sprinklerforum <[email protected] <mailto:[email protected]> > On Behalf Of Parsley Consulting via Sprinklerforum Sent: Wednesday, January 29, 2020 11:16 AM To: Brian Harris via Sprinklerforum <[email protected] <mailto:[email protected]> > Cc: Parsley Consulting <[email protected] <mailto:[email protected]> > Subject: Re: Misc. Storage Brian, I'll be happy to share my perspective for you. * Review the definition of miscellaneous storage in the paragraph you quoted. It sounds to me as though you've described a building where the storage of 42,000 ft² is not "incidental" to other use of the building, is not less than 4,000 ft² in area, and is not less than 10% of the building area. It meets only one of the criteria as miscellaneous storage - that it doesn't exceed 12' in height. * So, we're looking at rack storage of class I-IV commodities, to 12'-0" high. In §16.2.1.2.1 the protection for those commodities, stored up to and including 12'-0" "shall be the same as miscellaneous storage from Chapter 13." That does not mean that it IS miscellaneous storage, simply that it is to be protected per the criteria in chapter 13. This is confirmed in §13.2.1(5) which says Table 13.2.1 and Figure 13.2.1 shall apply to "storage of class I through IV commodities up to 12' in height as directed by 14.2.3.1 and 16.2.1.2.1. * Sorry to disagree with your client, however in my read of table 13.2.1, I see that Class IV commodities stored in "rack storage" below 10' can be protected by an OH2 density. Once the storage exceeds 10', but remains less than 12', the density jumps to EH1, the ceiling height is limited to 32'. * I suggest you take a good long look at 5.6.1.2, in its entirety for protection of mixed commodities. Also, how are you intending to exceed the limit for a system protection storage of 40,000 ft² in 8.2.1, or EH? hope that gives you some help, Ken Wagoner, SET Parsley Consulting 350 West 9th Avenue, Suite 206 Escondido, California 92025 Phone 760-745-6181 Visit the website <http://www.parsleyconsulting.com/> On 01/29/2020 7:44 AM, Brian Harris via Sprinklerforum wrote: Just want to confirm per the definition of Misc. Storage (3.9.1.18 NFPA 2013) that just because something is stored less than 12 high doesnt automatically make it misc. storage. Working on a project that is 42,000 sq.ft. and the owner is storing Class I-IV commodities on double row racks. Says he was told as long as he doesnt exceed 12 high he only needs OH-2 protection at the ceiling Brian Harris, CET BVS Systems Inc. Design Manager bvssystemsinc.com <http://bvssystemsinc.com/> Phone: 704.896.9989 Fax: 704.896.1935 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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