Tim, We specifically call for "treated" NOT "coated" if you are going to use that exception. "Treated" wood requires a pressure treatment and the coating does not qualify. (At least it hasn't met the 20 minute extended tests outlined in the standard when we had discussed it.)
It should be recognized that the above is my opinion as a member of the NFPA 13 Committee, and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects and should therefore not be considered, nor relied upon, as the official position of the the NFPA, nor any of their technical committees. Sincerely, Cecil Bilbo Academy of Fire Sprinkler Technology Champaign, IL 217.607.0325 www.sprinkleracademy.com<http://www.sprinkleracademy.com> [email protected]<mailto:[email protected]> ?? OUR STUDENTS SAVE LIVES!! ________________________________ From: Sprinklerforum <[email protected]> on behalf of tstone52--- via Sprinklerforum <[email protected]> Sent: Wednesday, February 10, 2021 9:34 AM To: [email protected] <[email protected]> Cc: [email protected] <[email protected]> Subject: Fire Retardant Coating used in Combustible concealed spaces Project is a 100 year old 6 story Steel & Concrete Hotel building. The roof is steel framed with concrete above and the Sixth floor ceiling is Plaster over metal lath. Over the years the building has been added onto with wood framing above the Sixth floor ceilings. As Part of a major renovation started in 2020, the installation of a complete NFPA 13 sprinkler system and Standpipes is taking place. A few substantial combustible concealed spaces have been discovered throughout the building on other floors too. If nothing is done the sprinkler design areas would need to be increased to 3,000 SF as outlined in Chapter 11.2.3.1.5. The sprinkler contractor and I have suggested filling these spaces with noncombustible Insulation. The architect and builder are discussing Flame Retardant Coating to be applied to the wood framing in order meet the Non-Combustible and Limited Combustible concealed space definition. In reviewing Chapter 11.2.3.1.5.2 I don't see where Flame Retardant Coating is an option in order to reduce the design area. I believe In order to reduce the Design areas these combustible spaces need to be filled with noncombustible Insulation. Would "Flame Retardant Coating" be considered an option as outlined in A.8.15.1.2.11 (commentary text) the equivalency provisions in Section 1.5? Thank you for your imput. Regards, G. Tim Stone G. Tim Stone Consulting, LLC NICET Level III Engineering Technician Fire Protection Sprinkler Design and Consulting Services 117 Old Stage Rd. - Essex Jct., VT. 05452 CELL: (802) 373-0638 TEL: (802) 434-2968 <mailto:[email protected]> [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
