OT: Deck design and building.


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Old 06-08-2010, 04:16 PM   #1
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Default OT: Deck design and building.

OK I am rebuilding my deck. The code says this.

Joist size 2x6 Joist spacing 16" OC joist Span 9'5"

Joist size 2x6 Joist Spacing 24"OC Joist Span 7'10"

OK Spacing is the distance between the center of each joist what is the span? This is going to be attached to the house via 2x8 ledger board attached to solid concrete. I need the deck to be 12' from house on one part and 16' from the house on another. So if I used 16" oc spacing I could go out from the house 9" and set footings (Precast concrete supports)

Here is what it needs to look like.



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Old 06-08-2010, 05:12 PM   #2
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I believe that span refers to the maximum length the joist can run between support posts. Too long a span on a 1 x 6 will lead to a sag which pulls the deck away from the ledger board. You either need a center post or a bigger joist such as a 1 x 10



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Old 06-08-2010, 05:17 PM   #3
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It is prudent to use pier and post supports for each joist at a 4' - 6' intervals. This pervents sag and sway of the structure. The closer the pier supports and the narrower the joist spacing, the more stable the deck.

Oh, it also costs more money! Be sure that everything that is even close to soil is pressure treated.

Have fun Tango!!

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Old 06-08-2010, 05:25 PM   #4
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The whole thing is going to be PT Southern Yellow Pine. Only because I can't get redwood back here in the east.....My dads redwood deck is rot free and has been standing for 25+ years. All it ever needs is a coating of redwood deck oil....

I was thinking of doing that dune...

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