Apparently the access panels suggest you need access. I don't
understand why in such a shallow space. Where I have needed to make
the combustible concealed space compliant I've just had the contractor
fill it with insulation and make it exempt.

On Tue, Sep 8, 2009 at 11:32 AM, Thom McMahon<[email protected]> wrote:
> CC sprinklers are not "Required" they are specific application sprinklers,
> and IF you use them you must follow their rules. You can use SSP/SSU
> sprinklers. CC were created for spaces like this and from everything I've
> seen outperform SSP/SSU in this application.
>
> 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 [email protected]
> Sent: Tuesday, September 08, 2009 12:33 PM
> To: [email protected]
> Subject: Re: Church platform
>
> The 3K option is not viable because of the water. I know the space has to be
> protected if they don't use FR lumber. I was looking for hints in case
> anyone has done this in the past and srtumbled upon a design that has worked
> well. The clear space from the concrete floor to the bottom of joists is
> about 1'-9". I assume CC sprinklers will be required
>
> Sent from my Verizon Wireless BlackBerry
>
> -----Original Message-----
> From: <[email protected]>
>
> Date: Tue, 8 Sep 2009 14:11:05
> To: <[email protected]>
> Subject: RE: Church platform
>
>
> Depending on the size of the platform,and the overall size of the project,it
> may
> be more economical to protect below than not,because of the increased pipe
> size due to the 3000 sf. design area above if left unprotected.
>
> Lamar Vaughn,SET
>
>
> ---- Thom McMahon <[email protected]> wrote:
>> 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.
>>
>>
>>
>> [email protected]
>>
>> www.fire-design.com
>>
>>
>>
>>
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-- 
Ron Greenman
Instructor
Fire Protection Engineering
Bates Technical College
Tacoma, WA

Member:
SFPE, ASCET, NFPA, AFSA, NFSA AFAA, WSAFM
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