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Grab-bar FW penetration

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jonlaury(at)impulse.net
Guest

Posted: Wed Feb 22, 2006 12:12 am Post subject: Grab-bar FW penetration

I think this was discussed in Vol 11 of the AC, but I loaned my copy to a friend.



Re the "grab bar" method, I recall that Bob said to fill the tube with firecaulk after all the wires were pulled. Now I see people are looking for the appropriate size firesleeve for their grab-bar conduit.



How does one use the firesleeve and get an air tight seal?



Thanks,

John

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rv8ch

Joined: 10 Jan 2006
Posts: 250
Location: Switzerland

Posted: Wed Feb 22, 2006 1:48 am Post subject: Grab-bar FW penetration

> Re the "grab bar" method, I recall that Bob said to fill

 > the tube with firecaulk after all the wires were pulled.

 > Now I see people are looking for the appropriate size

 > firesleeve for their grab-bar conduit.

 >

 > How does one use the firesleeve and get an air tight seal?

Hi John,



Here's how these guys recommend doing it.  I'm planning

on doing the same thing on mine.



http://www.epm-avcorp.com/fwalinst.html



Here is my USD 30.00 "custom" towel bar:



http://www.rv8.ch/article.php?story=20060222102305941



Mickey



-- 

Mickey Coggins

http://www.rv8.ch/

#82007 finishing

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_________________
Mickey Coggins
http://www.rv8.ch/

nuckollsr(at)cox.net
Guest

Posted: Wed Feb 22, 2006 6:26 am Post subject: Grab-bar FW penetration

At 12:04 AM 2/22/2006 -0800, you wrote:



 	  Quote: 	
		  



I think this was discussed in Vol 11 of the AC, but I loaned my copy to a 

friend.



Re the "grab bar" method, I recall that Bob said to fill the tube with 

firecaulk after all the wires were pulled. Now I see people are looking 

for the appropriate size firesleeve for their grab-bar conduit.



How does one use the firesleeve and get an air tight seal?


	


No sealant inside the firesleeve . . .



See:



http://aeroelectric.com/articles/Firewall_Penetration/firewall.html



        Bob . . .

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

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jonlaury(at)impulse.net
Guest

Posted: Wed Feb 22, 2006 11:56 am Post subject: Grab-bar FW penetration

Subject:      Re: Grab-bar FW penetration

      From:      Robert L. Nuckolls, III (nuckollsr(at)cox.net)

      Date:      Wed Feb 22 - 6:26 AM



 	  Quote: 	
		  No sealant inside the firesleeve... So the last picture shows a piece of firesleeve wrapped around the wire bundle and the hose clamp "seals" it to the bundle? No sealant necessary?Next question: At Home Depot, there are 3-4 3M fire sealant/barrier caulks to chose from. Some are intumescentand some are not. Which one for FW's? I would guess that you don't want intumescent caulk expanding between FW layers during a fire. Mine is a composite firewall using Rohacell foam/glass sandwich for structure and Fiberfrax for fire protectionwith an aluminum sheet over the Fiberfrax for a wipeable surface.ThanksJohn


	


At 12:04 AM 2/22/2006 -0800, you wrote:



 	  Quote: 	
		  



I think this was discussed in Vol 11 of the AC, but I loaned my copy to a

friend.



Re the "grab bar" method, I recall that Bob said to fill the tube with

firecaulk after all the wires were pulled. Now I see people are looking 

for the appropriate size firesleeve for their grab-bar conduit.



How does one use the firesleeve and get an air tight seal?


	


No sealant inside the firesleeve . . .



See:



http://aeroelectric.com/articles/Firewall_Penetration/firewall.html



        Bob . . .

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Bruce(at)glasair.org
Guest

Posted: Wed Feb 22, 2006 3:19 pm Post subject: Grab-bar FW penetration

John,



3M (CP-25) caulk is used around the firewall because the foam contracts when

heated so you want to use an intumescent calk here. Around the fire sleeve I

would not expect any shrinkage so a non intumescent calk would be my choice.

You might look at RTV-88.



Bruce

www.glasair.org

 



--

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nuckollsr(at)cox.net
Guest

Posted: Wed Feb 22, 2006 6:20 pm Post subject: Grab-bar FW penetration

 	  Quote: 	
		  

 >No sealant inside the firesleeve... So the last picture shows a piece of 

 firesleeve wrapped around the wire bundle and the hose clamp "seals" it 

 to the bundle?


	


    correct



 	  Quote: 	
		  No sealant necessary?


	


    that's what the 'big' guys do . . .



 	  Quote: 	
		  Next question: At Home Depot, there are 3-4 3M fire sealant/barrier caulks 

to chose from. Some are intumescentand some are not. Which one for FW's? I 

would guess that you don't want intumescent caulk expanding between FW 

layers during a fire. Mine is a composite firewall using Rohacell 

foam/glass sandwich for structure and Fiberfrax for fire protectionwith an 

aluminum sheet over the Fiberfrax for a wipeable surface.


	


   I've not researched their range of products and I'd

   have to run them by my power plant guys at RAC. I think

   others on the list have made suggestions about this . . .

        Bob . . .

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

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jonlaury(at)impulse.net
Guest

Posted: Thu Feb 23, 2006 9:44 am Post subject: Grab-bar FW penetration

Mickey, Bruce, and Bob,



Thanks all, for your help.

John



do not archive

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