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Exterior Contains discussions about the exterior portion of a home inspection. This includes roofs, gutters, downspouts, decks, patios, windows, et cetera.

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  #1  
Old 3/22/09, 12:00 PM
Vince Santos's Avatar
Vince Santos Vince Santos is offline
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Default Deck Support Illustration
Anyone have a deck support illustration? I'm specifically looking for a diagram for supporting at an overhang as seen on the left in this photo.
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  #2  
Old 3/22/09, 12:33 PM
Larry D. Kage Larry D. Kage is offline
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Default Re: Deck Support Illustration
A lot of problems with that deck, including attaching at an overhang.

http://www.awc.org/Publications/DCA/DCA6/DCA6.pdf


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  #3  
Old 3/22/09, 12:33 PM
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Michael R. Boyett Michael R. Boyett is offline
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Default Re: Deck Support Illustration
Vince, such a deck design is not allowed by the AFPA Deck Design Guide based on the IRC, see pg 12 of the guide that Larry referenced. It should have been designed and built as a 'free standing' deck from the git-go.
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Old 3/22/09, 1:38 PM
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Marcel R. Cyr Marcel R. Cyr is offline
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Default Re: Deck Support Illustration
Amazing isn't it?

Not much lateral stability either.

Post to beam connections.

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Old 3/22/09, 3:29 PM
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Marcel R. Cyr Marcel R. Cyr is offline
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Default Re: Deck Support Illustration
Quote:
Originally Posted by mboyett View Post
Vince, such a deck design is not allowed by the AFPA Deck Design Guide based on the IRC, see pg 12 of the guide that Larry referenced. It should have been designed and built as a 'free standing' deck from the git-go.
Michael, I believe there might be an exception the that statement.

Check here on page 7 for attatchment to cantilevered overhangs.

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  #6  
Old 3/22/09, 5:47 PM
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Michael R. Boyett Michael R. Boyett is offline
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Default Re: Deck Support Illustration
Great! Those two documents conflict it would appear. Pick the one you prefer I suppose?

See: deck-support-illustration-capture.jpg
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  #7  
Old 3/22/09, 6:01 PM
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Marcel R. Cyr Marcel R. Cyr is offline
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Default Re: Deck Support Illustration
Michael, I believe they prefer to not allow it because in most cases the rim joist is not exposed on the inside and therefore the additional reinforcement necessary to provide a safe attachment would not get done.
I believe there is room for a little common sense on the builders part of it also.

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  #8  
Old 3/22/09, 6:09 PM
John Evans John Evans is offline
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Default Re: Deck Support Illustration
Maximum cantilever allowed beyond the beam is 24".


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  #9  
Old 3/22/09, 6:17 PM
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Marcel R. Cyr Marcel R. Cyr is offline
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Default Re: Deck Support Illustration
Quote:
Originally Posted by jevans View Post
Maximum cantilever allowed beyond the beam is 24".
For decks framed with 2"x10" joist and 2:1 ratio of back span, 3' is allowed.

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  #10  
Old 3/22/09, 6:32 PM
John Evans John Evans is offline
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Default Re: Deck Support Illustration
Marcel,
You are correct, my mistake. Thinking of the beam to post overhang, 24".


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  #11  
Old 3/22/09, 8:28 PM
Larry D. Kage Larry D. Kage is offline
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Default Re: Deck Support Illustration
Quote:
Originally Posted by mcyr View Post
Michael, I believe there might be an exception the that statement.

Check here on page 7 for attatchment to cantilevered overhangs.

Marcel
Read all the criteria for that type of install and I think you will agree that, typically, we can not verify that it was done.


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