This report, ESR-2397 appears to be an update to NER-516, dated January 1, 2004. While I haven't done a detailed comparison, one difference that pops out at me is the following.
(Old text from NER-516): "7.8 All combustible materials shall be kept 2 inches (51 mm) from the face of the glass. This can be accomplished by a 36-inch (914 mm) pony wall. The evaluation of the use of alternative methods to the pony wall described in this report to maintain a minimum 2-inch (51 mm) clearance of combustibles from the face of the assembly is outside the scope of this evaluation. The use of an alternative method shall be subjected to the specific approval by the authority having jurisdiction and evidence supporting the alternative construction shall be submitted to the code official with the application for permit." (New text from ESR-2397): "5.7 All combustible materials shall be kept 2 inches (51 mm) from the face of the glass, such that the complete coverage of the glass by the sprinklers is not impeded. This is accomplished by a minimum 36-inch-high (914 mm) knee or 'pony' wall at the base of the assembly. The means for maintaining clearance must be as set forth in this evaluation report." It appears the flexibility of the pony wall has been removed. I seem to recall that the pony wall was once in the cut sheet for this sprinkler but that it was removed several years ago. Eric J. Shelton, PE Senior Fire Protection Engineer Hankins and Anderson Consulting Engineers 4880 Sadler Road Suite 300 Glen Allen, VA 23060 v: (804) 521.7105 f: (804) 217.8520 http://www.haengineers.com Do you really need to print this e-mail? -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Chris Cahill Sent: Monday, June 22, 2009 5:24 PM To: sprinklerforum@firesprinkler.org Subject: RE: Window Sprinkler for Fire Rated Assemblies Is there something new here? Quick read it's nothing new. Even the spec section is old. Actually it's not an alternate IMHO. Meets the same test standard as other traditional materials used for rated walls. If the AHJ would allow sheetrock for example based on a UL listing then they would also have to accept WS heads. Even further one could use them in an otherwise unsprinklered building. Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: chr...@sentryfiremn.com Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Dave Phelan Sent: Monday, June 22, 2009 3:55 PM To: sprinklerforum@firesprinkler.org Subject: Window Sprinkler for Fire Rated Assemblies http://www.icc-es.org/reports/pdf_files/ICC-ES/ESR-2397.pdf I know we occasionally get on the topic of design and such for window sprinklers for alternate design for interior fire rated assemblies so this might be worth tucking away for future use. The ICC Evaluation Service has released an approval and design document for providing window sprinklers as an alternate to fire rated assemblies in the IBC. Best wishes all - Dave P. _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: techsupp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field)
