Skip to Content

The Many Parts of a Deck (Very Detailed Diagram)

Parts of deck collage

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.

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.

Chat Box

Home Expert (Bot)
Hello, how are you? Ask me anything about interior design, home improvement, home decor, real estate, gardening and furniture.