Yes, it is a flat roof, built in 1973. I have no doubt that it will burn, and I am classifying it as a combustible roof. (I know about the fire at the GM plant in Livonia.) My question is more along the line of: Can a noncombustible structure built on top of a typical built-up roof deck with combustible insulation meet NFPA 13's definition of "Limited-combustible construction"?
From: Sprinklerforum [mailto:[email protected]] On Behalf Of Art Tiroly Sent: Friday, March 10, 2017 5:14 PM To: [email protected] Subject: RE: Built-up roof deck as a limited-combustible construction Is it a flat roof? Is it covered with gravel or stone? If it is built of felt paper and asphalt/tar it will burn. Art Tiroly ATCO Fire Protection/Tiroly 24400 Highland Rd CLE 44143 216-621-8899 216-570-7030 cell From: Sprinklerforum [mailto:[email protected]] On Behalf Of David Bitton Sent: Friday, March 10, 2017 4:57 PM To: [email protected] Subject: Built-up roof deck as a limited-combustible construction Hello, I have a 35 ft high building being built adjacent to a 22 ft high building which has a built-up, insulated metal deck roof. The structural engineer has devised a sloped "snow shed" between the addition and the lower building in order to distribute the increased snow load at this juncture. This will create an inaccessible concealed space on the roof which will be of noncombustible construction, with the exception of its base, which will be the built-up metal deck roof of the existing building. Would you consider this as meeting the definition of "limited combustible construction", meaning that the space would not require sprinkler protection? David Bitton, ing./Eng. Quest Loss Control Services Inc. 5100, rue de la Savane, bureau 200 Montréal, Québec H4P 1T8 T: (514) 341-4545 C: (514) 996-7483 www.questlosscontrol.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=emailclient&utm_term=icon> Virus-free. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=emailclient&utm_term=link> www.avast.com
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