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-   -   Unsafe Deck? (http://www.diychatroom.com/f19/unsafe-deck-154996/)

Mahogany 08-27-2012 11:26 AM

Unsafe Deck?
 
I recently purchased a 6-year old house with an existing wooden deck attached to the back of the house. I noticed this past weekend that the rim joist is face nailed to the 6x6 posts. Would the addition of diagonal bracing and through-bolts where the rim joist is attached to the beam, provide enough support for the rim joist? I'm afraid this may be an expensive repair otherwise.

joecaption 08-27-2012 11:35 AM

Post a picture.
Most likly what you suggested would work.

Mahogany 08-27-2012 12:44 PM

Yes, pics would be helpful. I will try and post some tomorrow.

scottktmrider 08-27-2012 04:34 PM

Yes bolts will help.How wide is the deck coming off of the house.You might want to put a beam under it.

I dont understand but nobody on this site can answer a question with out a picture.I guess they cant picture it in thier head.

AndyWRS 08-27-2012 04:42 PM

I beleive Joe did answer it to the best of his ability...he asked for a pic to make sure he wasnt sending the OP in the wrong direction.

robertcdf 08-27-2012 06:14 PM

The beam should BEAR on top of the posts, if the beam is attached to the SIDE of the post then 2x4/2x6 PT should be added to the side of the post under the beam down to the footing on a standoff post base. Or temporarily support the beam and remove the post, then cut it to properly fit under the beam.

Duckweather 08-27-2012 07:38 PM

There have been hundreds of decks built like this, (not saying it is right because it isn't). Most end up getting bolted, bracketed, replaced, etc. If you have any snow load it is much more serious.

GBrackins 08-27-2012 08:20 PM

Quote:

Originally Posted by scottktmrider (Post 997684)
I dont understand but nobody on this site can answer a question with out a picture.I guess they cant picture it in thier head.

I've been designing buildings for over 30 years and I'd love to see a photo or two to make sure I understand the existing conditions before giving useful suggestions. Terminology is not always used properly by posters.

Maybe it's me, but I don't think I've ever seen a rim joist attached directly to a beam (per OP statement), I've seen joists attached to beams with either a drop beam or flushed framed beam. A rim joist is typically at the ends of floor joists running perpendicular to the joists. Now if this truly is a rim joist (single ply) that is connected to the posts (again, per OP) then I'd say there is either quite a few posts or it may not be of sufficient area for a bending member. A photo can answer these questions.

Now to the OP, if you check out the link below it will take you to the American Wood Council's "Prescriptive Residential Wood Deck Construction Guide." It provides the requirements for code compliant deck construction to meet the requirements of the 2009 International Residential Code (basis for most local and state building codes, your code may differ).

http://www.awc.org/publications/DCA/DCA6/DCA6-09.pdf

Figure 11 on page 8 indicates the proper attachment the rim joist to the floor joists. Figure 22 on page 14 indicates installation of lateral bracing for your deck.

If you post photos I'll be sure to check them out and provide appropriate feedback.

Hope this helps :thumbsup:

Tham 08-27-2012 10:32 PM

Quote:

I dont understand but nobody on this site can answer a question with out a picture.I guess they cant picture it in thier head.
because every situation is unique. Supposing something that involves a structure can be life threatening.

Simple enough?
Tham

kwikfishron 08-28-2012 06:31 AM

Quote:

Originally Posted by GBrackins (Post 997893)
I'd love to see a photo or two to make sure I understand the existing conditions before giving useful suggestions. Terminology is not always used properly by posters.

Exactly…I’ve seen many threads on this site where a question is asked then overzealous members offer solutions that end up to be completely wrong when twenty post later op finally posts a picture.

That exact situation was the basis for my signature line.

GBrackins 08-28-2012 06:48 AM

you know it kwikfishron, you get one chance to get it right the first time thus my tag line ....

I never do a design without visiting the site and evaluating the existing conditions. This includes a new home on a vacant lot unless I have a complete topographic survey by a surveyor.

Mahogany 08-28-2012 11:54 AM

Photos
 
2 Attachment(s)
I'm posting a couple of pics of the situation. Thanks for any advice you can offer.

drtbk4ever 08-28-2012 12:14 PM

I'd like to see that rim joist doubled up and definitely bolt the rim joist to the post.

It lookes like the post extends through the decking for the railing posts. Is that correct? There should be a bit more support for the decking where it is cut around the posts.

Let's await the experts for more input.

Mahogany 08-28-2012 12:32 PM

Quote:

Originally Posted by drtbk4ever (Post 998389)
...

It lookes like the post extends through the decking for the railing posts. Is that correct? There should be a bit more support for the decking where it is cut around the posts...

Yes, the posts extend through the decking.

GBrackins 08-28-2012 02:03 PM

what are the dimensions of the deck, height about ground, size of joists, and spacing between posts?


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