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Deck Framing for a 20×20 Deck

Framing a 20×20 deck takes about 16 joists (16" OC), a doubled beam and ledger along 20', 4 posts, and 16 joist hangers. Change the span and spacing below.

Joists needed
16 joists
Joists
16 pieces20' span at 16" on-center
Beam & ledger
60 lin ftdoubled beam + ledger along 20'
Posts
4 posts6×6 PT, ~8' spacing
Joist hangers
16 each
Framing cost (est.)
$958lumber + hardware, excl. footings
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Other sizes

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