MyFloridaCode.com

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_ 
(http://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)


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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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--


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