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Rooms · Chapter 11

Porches + decks

Outdoor rooms built in the weather. Decks fail at the connection to the house, so code is strict about the ledger, guards and stairs.

IRC R507 decksIRC R312 guardsIRC R311.7 stairsLocal frost depth
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11.1

What makes a deck or porch?

A deck is a structure: footings, posts, beams, joists, a ledger to the house, decking, guards and stairs. A porch adds a roof.

The ledger is where decks fail.
Section: deck with footing, post, beam, joists, ledger bolted to house with flashing, guard and stair
  1. 1Footing
  2. 2Post
  3. 3Beam
  4. 4Joist
  5. 5Ledger
  6. 6Decking
  7. 7Guard
  8. 8Stair
FIG. 11.1 · What makes a deck or porch?
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The rest of Porches + decks: 5 more spreads, 29 drawings and 25 code citations, plus every other chapter, is part of the full fieldbook.

  1. 11.2Footings, ledger and framing6 drawings
  2. 11.3Guards and stairs6 drawings
  3. 11.4Decking materials6 drawings
  4. 11.5Porch details6 drawings
  5. 11.6Common mistakes5 drawings

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