What Chris described is a non-combustible concealed space above a suspended ceiling with limited combustible insulation. I would say that the installation meets 8.15.1.2 and that 8.15.1.2.10 is not relevant to this installation. 8.15.1 lists multiple possible installation scenarios.
8.15.1.2.10 is a different type of system that is not what you have. Typically the rigid material is the white, blue or pink foam board. This stuff always raises questions about combustibility as most everyone is familiar with foam and how it reacts when exposed to heat and fire. In some cases the white Styrofoam panels are used as insulation and that material will not meet the criteria while the blue and pink most often does. So 8.15.1.2.10 addresses these types of material. The AHJ needs to read the rest of the section and understand it is addressing various installations. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [email protected] http://www.ch2m.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Haji, Jaber M Sent: Monday, March 02, 2009 11:15 PM To: [email protected] Subject: RE: Limited combustible material above suspended ceilings Hope this will help IMC, Section 602.2.1 Materials exposed within plenums. Except as required by Sections 602.2.1.1 through 602.2.1.5, materials within plenums shall be noncombustible or shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 50 when tested in accordance with ASTM E 84. Exceptions: 1. Rigid and flexible ducts and connectors shall conform to Section 603. 2. Duct coverings, linings, tape and connectors shall conform to Sections 603 and 604. 3. This section shall not apply to materials exposed within plenums in one- and two-family dwellings. 4. This section shall not apply to smoke detectors. 5. Combustible materials enclosed in no-combustible raceways or enclosures, approved gypsum board assemblies or enclosed in materials listed and labeled for such application. Jaber Al-Haji S.Aramco Loss Prevention Dept [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chris Russel Sent: Monday, March 02, 2009 9:14 PM To: [email protected] Subject: Limited combustible material above suspended ceilings Hello, Anyone had this issue with areas above suspended ceilings? I have an "attic" composed of non-combustible and limited combustible material. It is steel with noncombustible insulation and an insulation barrier with a flame spread index of 10 on the exposed side (15 on the insulation side) above suspended ceiling tiles with a class A fire rating (flame spread of 25 or under). The AHJ is telling me I need sprinklers in this area because the insulation barrier is not ridged per NFPA 13/2007 8.15.1.2.10. I thought if it conformed to 3.3.11 limited-combustible material definition it would not need to be sprinklered per 8.15.1.2.1. Thanks, Chris Russell t. 360.734.4940 f. 360.647.9540 securitysolutionsnw.com _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) ________________________________ The contents of this email, including all related responses, files and attachments transmitted with it (collectively referred to as "this Email"), are intended solely for the use of the individual/entity to whom/which they are addressed, and may contain confidential and/or legally privileged information. This Email may not be disclosed or forwarded to anyone else without authorization from the originator of this Email. If you have received this Email in error, please notify the sender immediately and delete all copies from your system. Please note that the views or opinions presented in this Email are those of the author and may not necessarily represent those of Saudi Aramco. The recipient should check this Email and any attachments for the presence of any viruses. Saudi Aramco accepts no liability for any damage caused by any virus/error transmitted by this Email. _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (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: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
