Deck Expansion Advice

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Old 11-17-17, 11:56 AM
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Deck Expansion Advice

Looking to tear down the awfully-constructed, falling-apart landing, put a new one in its place, and extend it to match with the existing deck. Yes I know the deck too is built oddly. But I'm thinking 4 posts ought to do it. 2 for the landing, 1 middle post, and 1 corner post. Was thinking 2-2x8 for the outer side joist, and fill the joists in the same way the existing deck is. The deck comes out 11' from the house, and the landing is 5' wide.

Thoughts? Thanks.
 
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Old 11-17-17, 12:13 PM
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Posts are attached to rim joists, no beam. Doesn't look too safe!

Are the posts notched also?
 
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Old 11-17-17, 01:01 PM
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On that deck yes, the posts are notched out. Definitely not to today's code (or maybe code from any time??). Really don't want to tear it down though.

It's weird cause the deck doesn't really have beams, it's like they built a few 11x10 squares and fastened them together, as you can see.
 
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Old 11-17-17, 01:02 PM
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And looks like only about an inch of bearing. No way that was inspected. I'd get the existing deck fixed first before you start adding to it.
 
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Old 11-18-17, 12:06 AM
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For fun let's just pretend the existing is Ok.
 
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Old 11-18-17, 06:38 AM
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Personally for this situation "for fun" is not an option!

You have a disaster waiting to happen that could seriously hurt someone.

Do the right think and fix the deck, if it can be fixed, before anything more is added.
 
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Old 11-18-17, 06:44 AM
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No one even asked about footings. Are there any, pretend or real?
 
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Old 11-18-17, 10:03 AM
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No one even asked about footings. Are there any, pretend or real?
I dont think we have to spend much time thinking about that.
 
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Old 11-18-17, 11:33 AM
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New 6x6's are going up. I didn't want to get into the weeds about the existing deck.
 
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Old 11-18-17, 12:29 PM
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See DCA6.

"Joists shall not frame in from opposite sides of the same beam."

(Which they already did on the existing, but you can avoid doing on the addition.)

Also, see table 3 (and figure 12 for post bases) for 2x8 beam spans if that is what you intend to use, which will tell you how often you need posts. If you are making a landing addition, it will need it's own beam on both ends of your joists, along with their own posts. (Independent of the existing deck, which could have an entire thread all its own... so I will try to stay out of the weeds... )

Consult table 3 (and figure 12) of the DCA6 when you go to add your new 6x6's as you reinforce the existing deck.
 
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Old 11-19-17, 08:26 AM
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The new landing will have a ledger anchored to the foundation, and then a beam on the other side but yeah I see what you're saying.

Thanks.
 
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