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Deck joist span and cantilever

3868 Views 6 Replies 4 Participants Last post by  carpdad
Building a deck beside a round above ground pool and have some questions. I have my 3 beams set and I'm getting ready to start laying joists. My joists need to cantilever over the beam closest to the pool and I am wondering about max cantilever. When the joist span charts list span are they talking about the span from the inner most beam to the outer most beam or is it the span between inner beam and middle beam, and then middle beam to outer beam? I am trying to calculate my max cantilever. My beams are about 8 feet apart and the outer beam is about 20 feet from the pool.

Also does going 12oc with my joists change the cantilever at all? Thanks in advance. Attached is a drawing of the layout to give an idea.


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If strictly following the rule, finding you are off by a few inches and have to dig a few more footings, you may try pinning the decking with 2x4 sleeper. It reinforces the decking to each other. Inspector will pass a few inches in this case.
Little (4x4') decking I used to have for the above ground pool was build on inorganic soil/tamped hole with paver blocks I had. The inspector made me put self closing hinge and a latch on the gate but passed this "footing".
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