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The Many Parts of a Deck (Very Detailed Diagram)

Deck being built

This is the best diagram illustrating the different parts of a deck. Actually it's a series of illustrations including the deck, railing, stairs and deck foundation. Fully illustrated from multiple angles. Ultimate deck blueprint.

I love decks.  I used to love watching Paul Lafrance’s Decked Out TV show.  That guy is a deck primary.

Because I’m so passionate about decks, I asked our graphics team to go all out on creating the ultimate “parts of a deck” anatomy diagram.

They delivered big time.

In fact, as you’ll see below, our graphic sets out the different parts for each aspect of building a deck.  This is a super helpful diagram if you’re planning on building a deck or designing a deck.

Parts of a deck diagram

Parts of a deck - detailed diagram of the foundation, railing, deck and deck stairs.

List of the various parts

Deck Foundation

  • Deck posts:  Main posts to which the deck attaches.
  • Intermediate joists: supporting joists in the middle of the deck.
  • Noggins:  Spacers for intermediate joists (keeps them straight and true).
  • Support beams:  beams under joists for additional support.
  • Deck board:  The deck surface.

The deck

  • Clips: Secures and steadies the joists.

See 17 different types of decking materials and styles here.

Deck stairs

  • Riser:  The height of each step (part of the riser).  See our parts of a staircase diagram here for more staircase information.
  • Tread run:  Where the steps sit (part of the riser).
  • Concrete foundation:  Slab on which the risers sit for solid foundation.

Deck railing

  • Top / cap rail:  The top railing beam (handrail).
  • Balustrade:  Vertical boards that make up the railing.  Can be spaced or have gaps.  Most decks have gaps.
  • Bottom rail:  The bottom horizontal support beam of the railing.
  • Newel:  Railing support posts.

Click here for 16 different types of deck railings.

 

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