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Deck Cantilever & Joist

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  • Feb 21st, 2021 10:30 am
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[OP]
Sr. Member
Jan 22, 2012
529 posts
194 upvotes
Bradford

Deck Cantilever & Joist

Planning to do a 12’x10’ extension onto my deck this spring. The joists will be 10’
I’ll have to add another double 2x8 beam but I’m wondering how much a 2x8 joist can cantilever over the beam? Is 2x8’ too big for joists?

Also, could pressure treated lumber be any more pricy.
4 replies
Deal Fanatic
Jan 25, 2007
9648 posts
5038 upvotes
Paris
I remember needing 2x12s for my cantilever of just under 24”. 16” OC.

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