Jackie, There was an excellent presentation on this topic at the AFSA convention last month. I believe the answer to your question can vary slightly depending on which version of NFPA 13 you are using. One of the most pertinent sections is the definition of multiple row racking. As long as you are meeting the definition of multiple row racking (keeping in mind that you probably don't have transverse flue spaces) and you select a protection scheme that covers multiple row racking with no transverse flue spaces, then you would be meeting NFPA 13 requirements. There should be multiple options for this, with ESFR usually being the most cost effective, in my limited experience (I have only dealt with this in taller configurations).
The bigger issue, which was discussed at the convention, is that some of the allowed designs in NFPA 13 are probably not adequate and will result in a potentially out of control fire/total loss. One of the most important factors is the depth of the rack, which you indicated as 36 feet. In most (all?) of the full scale fire testing that was done, fire spread along the entire depth of the rack, due seemingly to the lack of transverse flue spaces. Therefore, limiting the depth of the rack so that the fire is more easily contained and does not activate all the sprinklers in the building is probably crucial. I believe FM requires this dimension to be limited to 20 feet, but please double check me on that. I'm not an expert on this, so hopefully someone smarter than me will chime in and correct me where I'm wrong. Thanks, Skyler Bilbo 1700 S. Raney Street Effingham, IL 62401 217-819-6404 Cell 217-342-2242 Office [email protected] www.wenteplumbing.com On Wed, Oct 23, 2024 at 4:01 PM Jackie Ward <[email protected]> wrote: > I have an application where Cartoned and Exposed Non-Expanded Group A > Plastics are stored on open-frame, multi-row racks, Maximum 14’-4” storage > height, in drive-in racks that are up to 36’ deep. > > > > Am I required to utilize CMDA in accordance with Figure 25.3.2.4.1(b)? > > Would Table 22.5 be applicable for CMSA without in-rack sprinklers? > > Would Table 23.3.1 be applicable for ESFR without in-rack sprinklers? > > > > > > > > Sincerely; > > > > Jackie "JW" Ward; SET > > 1-405-240-7076 > > [email protected] > > NICET IV Cert. No. 104187 > > Victaulic Vortex Integrator > > > > Firetrol Protection Systems > > 108 NW 132nd Street; Oklahoma City, OK 73114 > > 405-752-2330 Ext. 10230 Fax:405-752-2297 > > License No: AR-FSS-162, LA-F415, OK-863 & 302, TX - ECR-1751432, > ACR-1751168, SCR-G-0292 > > > > [image: A close-up of a spray object Description automatically > generated][image: > A machine on a stand Description automatically generated][image: Firetrol > Oklahoma City BACK] [image: Mr_ Jackie _JW_ Ward] > https://www.minimax-mxone.com/ Victaulic Vortex > <https://www.victaulic.com/vtc_product_categories/victaulic-vortex/> > > > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected] >
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