This deck framing diagram is a detailed illustration that shows and labels each part of a deck. Below the illustration you’ll find a description of each deck framing component.
- Ledger: A horizontal board attached to the house, supporting one end of the deck joists.
- Joist Hanger: Metal bracket that secures joists to the ledger or beam, providing structural support.
- Joist: Horizontal framing members that span between the ledger and beam, supporting the decking.
- Rim Joist: Outer joist that runs perpendicular to the joists, enclosing the deck frame and providing lateral support.
- Decking: Surface boards laid over the joists, forming the walkable deck surface.
- Post: Vertical supports that transfer the deck’s load to the footings.
- Post Anchor: Metal hardware that connects posts to concrete footings, ensuring stability and preventing rot.
- Concrete Footing: Poured concrete base below ground that supports posts and distributes the deck’s weight.
- Riser: Vertical component of a stair, filling the space between treads.
- Tread: Horizontal stair surface where feet are placed, providing the stepping area.
- Stringer: Diagonal structural member that supports the treads and risers of a staircase.
- Beam: Horizontal structural member that supports the joists, typically resting on posts.
- Rail Post: Vertical posts that anchor the railing system, providing safety and support.
- Baluster: Vertical spindles or pickets between rail posts, filling the railing for safety.
- Top Rail: Horizontal rail connecting the tops of rail posts, providing a handhold.
- Cap Rail: Topmost railing piece, often wider, for aesthetic finish and added grip.
- Bridging: Small bracing pieces installed between joists to prevent twisting and enhance stability.
Why Pressure-Treated Wood Deck Framing Lasts Less and Changes in Treatments
Pressure-treated wood deck framing no longer lasts as long as it once did due to changes in preservative treatments. Historically, chromated copper arsenate (CCA) was used, offering robust protection against rot and insects, with decks lasting 30+ years.
However, in 2003, CCA was phased out for residential use due to health and environmental concerns, as arsenic was found to leach into soil, posing risks to humans and ecosystems. Newer treatments like alkaline copper quaternary (ACQ) and copper azole (CA) are safer but can be less effective in the long term, leading to rot in as little as 10-15 years, especially in moist environments.
Alternative Deck Framing Materials
To address these shortcomings, steel deck framing by New Castle Steel and aluminum deck framing by TimberTech and Outdure offer durable alternatives:
Steel Deck Framing:
Made in the USA with a triple-coated galvanized finish, it resists corrosion, rot, and insects, boasting a 50-year warranty. Steel remains flat, avoiding warping, and supports longer spans for open designs. It’s fire-resistant (Class 1A rating) and ideal for non-coastal areas, just swap in a steel-cutting blade in your saws and you’re ready to cut and build. Steel deck framing is a great investment backed by a 50 year warranty.
Aluminum Deck Framing:
Lightweight and rust-proof, it’s immune to rot, decay, and insects, making it perfect for coastal or wet environments. With a Lifetime Limited Warranty, it requires minimal maintenance and supports longer spans, reducing the need for posts. Its modular design simplifies installation and enhances design flexibility. Aluminum deck framing systems are manufactured by TimberTech and Outdure and are available to order from AdvantageLumber.com shipped directly to your home or job site.
Benefits Over Pressure-Treated Wood
Both steel and aluminum framing outlast pressure-treated wood, often exceeding 50 years with minimal maintenance, compared to wood’s 10-15 years. They resist rot, insects, and warping, ensuring a stable, level foundation. While initial costs are higher, their longevity and low upkeep reduce long-term expenses. Steel and aluminum are also compatible with various decking materials, offering design versatility and aesthetic appeal, making them ideal for durable, low-maintenance decks.