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Howdy - Building a 10x10' deck, 2 6x6 posts with drop beam 8' from ledger then a 2' cantilever, which will be mitered @45 for the "nipped edges" look.
I'm using 2x8 for the joyce's which attach to ledger, then will rest on beam made of 2-2x10 sandwiched.
My question is will it matter if I use 2x10 for the beam instead of 2x8 (which is the joyce size?) According to the "rules" I can use 2x8 beam for that length of run, but I want to overbuild it a little.
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| Your joist size is fine. The beam however should be a 2/2x10. Our beam span is 8' for this size. This means you can set the post in one foot on each side. Our code calls only for 6' with an 2/2x8. They recently reduced it to this size. It used to be 8' for the 2/2x8 and 10' for the 2/2x10. Clemens
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| Thanks for the info! B.T.W. - the decks pictured on finedecks.com look terrific.
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| Hi building 16x32 deck, what is the joists sizing s/b?
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| If your deck is 32' wide with 16' joists you will need 5 posts to create (4) 8' beam spans using 2-2x10 Southern Pine or 3-2x10 Ponderosa Pine. You can use this chart to size most beam spans and post spacing. http://www.decks.com/article40.aspx Mike Rudh Decks.com
Mike Rudh
Decks.com contributor
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Hi i need a 24 long beam
can i use 2x10x16 and 2x10x8
like this
16 8
8 16
16+8
8+16
or it has to be 16+8
and 16+8
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You want to splice the beam together over a post. You can overlap the splices as you suggested.
Mike Rudh
Decks.com contributor
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just for future reference. be careful setting posts 12" from the end of the girder or support beam on cantilevers. I know some contractors as well as myself have done this in the past because it looks better and you can miter the lower corner of the beam for appearance reasons. I recently had a deck fail inspection because of this. Code now states that a beam or girder must be supported directly on the end of the beam. Some inspectors allow us to set the post in a couple of inches because they know it looks better and it really isnt making a difference, however if they wanted to, they could still fail it. We set our posts directly under the end of the beam now and from there 6' max to next post with a 2/2x10 beam.
I'm not sure if this is just my county's code or international.
Les
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