MyFloridaCode.com

the draft stopping requirement is listed in the wood frame wall section but not the steel wall section
if both sides of the framing are drywall I don't see why either .  Perhaps ask the inspector where that requirement is found?

glen
  ----- Original Message ----- 
  From: Marquisconst at aol.com 
  To: codetalk at myfloridacode.com 
  Sent: Wednesday, July 22, 2009 12:13 PM
  Subject: [Florida Code Talk] draft stopping


  Can anyone explain why I am made to install draft stopping in all steel farming and an un vented roof system, where's the draft?

  Chris Kavala
  Marquis Const. & Dev. Inc. www.southernsips.com
  3714 Covington Drive
  Holiday, Florida 34691
  Toll Free ............................. 1-877-321-SIPS
  main: (727) 937-3090
  fax (727) 937-1849
  cell (727) 243-2717

  FL. LIC. # CBC036455 (residential / commercial)
  LA. LIC. # CL.0033845 (commercial GC)
  GA. LIC. # RLCO000624 (residential / light commercial GC)


  In a message dated 7/22/2009 12:00:48 P.M. Eastern Daylight Time, codetalk-request at myfloridacode.com writes:
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    Today's Topics:

       1. Penetrations through interior frame top plates,    one story
          single fm (Dave Forrest)
       2. Re: Penetrations through interior frame top    plates, one story
          single fm (Glen Mast)


    ----------------------------------------------------------------------

    Message: 1
    Date: Tue, 21 Jul 2009 21:39:39 -0400
    From: Dave Forrest <woodyrebel at gmail.com>
    Subject: [Florida Code Talk] Penetrations through interior frame top
        plates,    one story single fm
    To: CodeTalk at myfloridacode.com
    Message-ID:
        <35cf5afb0907211839i2cbf3037n87b533e229020fb3 at mail.gmail.com>
    Content-Type: text/plain; charset="iso-8859-1"

    If anyone can refer me to the code-book-page on this subject I would
    appreciate it. The purpose for filling these top plate penetrations is for
    fire stop. Different counties are stating different types of foam and or
    caulk for this. One county says the yellow foam from Home Depot in the can
    is acceptable.  While another county wants foam or caulk to have a fire
    rating label on the label. Question is does the caulking have to be fire
    rated and if so where is that in the code?(the penetrations are from
    electric wiring and vent stacks) Thanks in advance for your help.
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    Message: 2
    Date: Tue, 21 Jul 2009 22:39:35 -0400
    From: "Glen Mast" <glenmast at comcast.net>
    Subject: Re: [Florida Code Talk] Penetrations through interior frame
        top    plates, one story single fm
    To: "Dave Forrest" <woodyrebel at gmail.com>,
        <CodeTalk at myfloridacode.com>
    Message-ID: <7F48BD6BD239458F9E2A7F81FD9E4827 at glens>
    Content-Type: text/plain; charset="iso-8859-1"

    Here is the section from the 2004 Res. code
    See my comments at the end.

    R602.8 Fireblocking required.
    Fireblocking shall be provided to cut off all concealed draft openings (both vertical and horizontal) and to form an effective fire barrier between stories, and between a top story and the roof space. Fireblocking shall be provided in wood-frame construction in the following locations.
    1. In concealed spaces of stud walls and partitions, including furred spaces and parallel rows of studs or staggered studs; as follows: 
    1.1. Vertically at the ceiling and floor levels.
    1.2. Horizontally at intervals not exceeding 10 feet (3048 mm).
    2. At all interconnections between concealed vertical and horizontal spaces such as occur at soffits, drop ceilings and cove ceilings.
    3. In concealed spaces between stair stringers at the top and bottom of the run. Enclosed spaces under stairs shall comply with Section R311.2.2.
    4. At openings around vents, pipes, and ducts at ceiling and floor level, with an approved material to resist the free passage of flame and products of combustion.
    5. For the fireblocking of chimneys and fireplaces, see Section R1001.16. 
    6. Fireblocking of cornices of a two-family dwelling is required at the line of dwelling unit separation.
    R602.8.1 Materials.
    Except as provided in Section R602.8, Item 4, fireblocking shall consist of 2-inch (51 mm) nominal lumber, or two thicknesses of 1-inch (25.4 mm) nominal lumber with broken lap joints, or one thickness of 23/32-inch (19.8 mm) wood structural panels with joints backed by 23/32-inch (19.8 mm) wood structural panels or one thickness of ?-inch (19.1 mm) particleboard with joints backed by ?-inch (19.1 mm) particleboard, ?-inch (12.7 mm) gypsum board, or ?-inch (6.4 mm) cement-based millboard. Batts or blankets of mineral wool or glass fiber or other approved materials installed in such a manner as to be securely retained in place shall be permitted as an acceptable fire block. Batts or blankets of mineral or glass fiber or other approved non-rigid materials shall be permitted for compliance with the 10 foot horizontal fireblocking in walls constructed using parallel rows of studs or staggered studs. Loose-fill insulation material shall not be used as a fireblock unless specifica!
    lly tested in the form and manner intended for use to demonstrate its ability to remain in place and to retard the spread of fire and hot gases.
    R602.8.1.1 Unfaced fiberglass.
    Unfaced fiberglass batt insulation used as fireblocking shall fill the entire cross section of the wall cavity to a minimum height of 16 inches (406 mm) measured vertically. When piping, conduit or similar obstructions are encountered, the insulation shall be packed tightly around the obstruction.
    R602.8.1.2 Fireblocking integrity.
    The integrity of all fireblocks shall be maintained.


    The code is really for draft stopping (not fire stopping which is a totally different matter)
    The draft that they are worried about is from a small fire that would be contained in the cavity between the studs.
    If the product of combustion (CO2 mostly) can be kept inside of the cavity the fire will self extinguish in a relatively short period of time (most likely no one would even know it had been there except for the short that caused it).
    The problem you are experiencing is from no-one knowing exactly how much heat to expect from this intra-cavity fire.
    While the foam is an excellent draft stop at low temperatures it might melt at higher temperatures.  The counties that are asking for fire caulking know that it will handle the worst case scenario.  

    Since this is a national issue the manufacturers of one of the foams might want to apply to ICC or NFPA for a ruling if they feel their foam is up to the challenge.

    Might make a good science fair project.

    glen

      ----- Original Message ----- 
      From: Dave Forrest 
      To: CodeTalk at myfloridacode.com 
      Sent: Tuesday, July 21, 2009 9:39 PM
      Subject: [Florida Code Talk] Penetrations through interior frame top plates,one story single fm


      If anyone can refer me to the code-book-page on this subject I would appreciate it. The purpose for filling these top plate penetrations is for fire stop. Different counties are stating different types of foam and or caulk for this. One county says the yellow foam from Home Depot in the can is acceptable.  While another county wants foam or caulk to have a fire rating label on the label. Question is does the caulking have to be fire rated and if so where is that in the code?(the penetrations are from electric wiring and vent stacks) Thanks in advance for your help. 


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