I was going to ask about the location of the lights as well. I don’t think NFPA has any allowances, but does anyone know if they’ve done testing specifically with obstruction over the aisles only? Do obstructions still negatively impact ESFR protection if the obstruction are not located over the commodity that is burning?
More of a curiosity than a response to the original question. -Kyle M From: Sprinklerforum [mailto:[email protected]] On Behalf Of Bruce Verhei Sent: Tuesday, June 11, 2019 7:45 AM To: [email protected] Subject: [EXTERNAL] Re: ESFR Heads and Obstructions Over the aisles? Depending on type of lights I’d have questions too about locating ignition source. Locate one pallet load too high, and your on. Anecdotal, but I would say the couple I can think of sprinklers stopped quickly. E.G. A well known retail coffee company. Double load top tier with non-coffee retail goods. Class IV-banded, wooden pallets. Only a couple adjacent pallets burn. Less than common forklift at bottom of stack fire. Not ESFR, normal control mode. Best. On Jun 11, 2019, at 07:20, Dane Long <[email protected]<mailto:[email protected]>> wrote: In my opinion you would have to comply with one of the following. 8.12.5.2* Isolated Obstructions Below Elevation of Sprinklers. Sprinklers shall be arranged with respect to obstructions in accordance with one of the following: (1) Sprinklers shall be installed below isolated noncontinuous obstructions that restrict only one sprinkler and are located below the elevation of sprinklers such as light fixtures and unit heaters. (2) Additional sprinklers shall not be required where the obstruction is 2 ft (0.6 m) or less in width and the sprinkler is located horizontally 1 ft (0.3 m) or greater from the nearest edge of the obstruction. (3) Additional sprinklers shall not be required where sprinklers are positioned with respect to the bottom of obstructions in accordance with 8.12.5.1. (4) Additional sprinklers shall not be required where the obstruction is 2 in. (51 mm) or less in width and is located a minimum of 2 ft (0.6 m) below the elevation of the sprinkler deflector or is positioned a minimum of 1 ft (0.3 m) horizontally from the sprinkler. (5) Sprinklers with a special obstruction allowance shall be installed according to their listing. Thanks, <image001.png> <image002.png> <image003.png>Dane Long, CET Design Technician | Bamford Fire Sprinkler Co., Inc. P: 785.825.7710 F: 785.825.0667 A: 1383 W. North Street Salina, KS 67401 From: Sprinklerforum <[email protected]<mailto:[email protected]>> On Behalf Of James Crawford Sent: Monday, June 10, 2019 4:39 PM To: [email protected]<mailto:[email protected]> Subject: ESFR Heads and Obstructions We are having a discussion in the office regarding lights and ESFR sprinkler heads: Is there a distance below the ESFR sprinkler heads where a 24”x 48” light fixture is no longer an obstruction? This was brought up because we just completed a multi-tenant building and one of the tenants is installing racking and want the lights to be located just above the racking which is 10’-0” below the sprinkler heads. Would these lights still be considered an obstruction? Thank you James Crawford Phaser Fire Protection Ltd. Phone 604-888-0318 Fax 604-888-4732 Cel 604-790-0938 Email [email protected]<mailto:[email protected]> Web www.phaserfire.ca<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.phaserfire.ca&d=DwMFaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=JlVwC6qSz30ywD-tHaWoztAe1PEU6eg2oCxF96B5iz0&s=CjQJxW9DhKIoZqB2UjGcQmg9sLy1tVoV3OMlm6ewWqo&e=> _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org<https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprinkler.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwMFaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS3bn8etxB7nLN8OBJwQd9A&m=JlVwC6qSz30ywD-tHaWoztAe1PEU6eg2oCxF96B5iz0&s=Oa_S1T1zdnQ7cKdx9F4VtfjBHLzl5J2dysBizlJdrso&e=>
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