MyFloridaCode.com

Sure...please

 

From: codetalk-bounces at myfloridacode.com
[mailto:codetalk-bounces at myfloridacode.com] On Behalf Of Glen Mast
Sent: Wednesday, July 22, 2009 9:16 PM
To: Marquisconst at aol.com; codetalk at myfloridacode.com
Subject: Re: [Florida Code Talk] draft stopping

 

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,
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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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