Where would the "Wind borne debris" come from for an interior platform? Crawl spaces loading docks and platforms all could collect wind borne debris, but I wouldn't think an interior platform would.
Yes 11.2.3.1.4 does say when you need to use the 3000 SF design area Adjacent to these areas, but it does not say that the interior platform is anything other than a concealed combustible space. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Cliff Whitfield Sent: Tuesday, September 08, 2009 11:18 AM To: [email protected] Subject: RE: Church platform Thom, I think the platform is intentionally separated with a comma just for that purpose. If you look over in 11.2.3.1.4 "Restrictions" (3) specifically addresses both 8.15.1.2 & 8.15.6. I think it includes interior platforms. Not sure why they gave it a separate heading and just didn't include it with the concealed space items. In reply to an earlier response, I don't think the presence of electrical wiring constitutes a need for sprinklers in a space like this but the access panels/doors certainly would. Cliff -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom McMahon Sent: Tuesday, September 08, 2009 11:56 AM To: [email protected] Subject: RE: Church platform 8.15.1.1 Concealed Spaces Requiring Sprinkler Protection. All concealed spaces enclosed wholly or partly by exposed combustible construction shall be protected by sprinklers except in concealed spaces where sprinklers are not required to be installed by 8.15.1.2.1 through 8.15.1.2.16 and 8.15.6. I love where the std can be used to Yeah and Nay at the same time. So where can we use the "Platform" exclusion. I say that this is a question for the committee, but my personal position is that we need more info. I believe that the "Platform generally referred to is an exterior loading platform. I believe that your relying on the comma between the "Exterior docks and platforms" Without the comma there is no confusion that the platform is also exterior. In your case it's an interior platform, so I would say 8.15.1.1 applies. What is the construction of this platform? If you build it of "Composite wood joist construction" You'd better sprinkler it, or you're looking at a 3000 SF design area above and below it. (If there is a below it.) If its wood construction of any type and not fire rated, how is it not a concealed combustible space? 8.15.6.1 Unless the requirements of 8.15.6.2 are met, sprinklers shall be installed in spaces under all combustible ground floors, exterior docks, and platforms. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Tuesday, September 08, 2009 8:59 AM To: [email protected] Subject: RE: Church platform And a height at which it would be tempting to store tables below it, etc. so protection would be reqd- although leaving 18" clear above the spkrs would be difficult to enforce past the design phase. Also, if the church is using real alcohol vrs grape juice, the prev #13 reference asks if flammable liquids are handled above the platform or deck. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Johnston Sent: Tuesday, September 08, 2009 10:51 AM To: [email protected] Subject: RE: Church platform I have done a couple of these both were under 30" off the floor, both had access panels, and both had lots of wiring under them. I didn't consider using 8.15.6, due to the wiring and access panels. Jim Johnston, P.E. Fire Protection Engineer Inland Fire Protection, Inc 1100 Ahtanum Road Yakima, WA 98903 Phone 509-248-4471 Fax 509-248-1180 [email protected] -----Original Message----- From: Cliff Whitfield [mailto:[email protected]] Sent: Tuesday, September 08, 2009 7:34 AM To: [email protected]; [email protected] Subject: RE: Church platform Todd, Would this not fall under 8.15.6 "Spaces under Ground Floors, Exterior Docks, and Platforms"? If it met all of the requirements I would think you could exclude heads under the platform. Don't forget to apply the 3000 sf remote area if you elect to not sprinkler that area. Cliff Whitfield, SET President Fire Design, Inc. 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