7 Essential Types of Deck Support

Deck support systems are integral to the structural integrity and longevity of decking structures, whether they're simple wooden platforms or complex, multi-level steel constructions. Choosing the right support depends on various factors, including the deck's size, layout, the material used, and local building codes. This article explores the different types of deck support, their applications, and benefits.

Deck support systems can be categorized into several types, each with its unique features and uses. Understanding these types helps homeowners, builders, and architects make informed decisions when planning and constructing decks.

.foundation Support

The foundation is the base upon which a deck is built. It can take several forms, depending on the design and terrain.

Concrete Footings

Concrete footings are one of the most common types of foundation support. They involve pouring concrete into forms sunk into the ground, creating a stable base for the deck posts. This method is suitable for decks with heavy loads and in areas with expansive soil or high water tables.

Pros: Durable, stable, and effective in preventing settlement and movement. Also, they allow for easy adjustment during construction.

Pressure-Treated Wooden Posts

Pressure-treated wooden posts can also serve as foundation support. They're often used for small decks and in areas where frost is not a concern. These posts are subjected to a process that makes them resistant to rot, decay, and insect damage.

Pros: Easier to install than concrete footings, and they're less expensive. Additionally, they blend well with wooden decking.

Deck Frame Support

The deck frame supports the decking boards and helps distribute their weight evenly. The type of support used depends on the deck's design and the material chosen for the framing.

Ledger Board Support

The ledger board is a horizontal framing member that attaches to the house, supporting the deck joists. This type of support is common in attached decks and should only be used where permitted by local building codes. The ledger board must be securely anchored to the house framing for stability.

Pros: Allows for the easy transfer of load from the deck to the house. It also simplifies the installation of deck railing systems.

Joist Support

Deck joists are perpendicular to the ledger board or support beam and span the length of the deck. They're typically made of pressure-treated lumber or steel joist hangers that support the decking boards. The spacing of the joists depends on the load they'll bear and the material of the decking.

Pros: Evenly distributes the load of the deck, making it stable and less prone to sagging or bending. Also, they simplify the installation of decking materials.

Deck Post Support

Deck posts support the deck's frame and transfer its weight to the foundation. The choice of post material depends on the desired aesthetic, the deck's size, and load requirements.

Wooden Deck Posts

Wooden posts are commonly used due to their aesthetic appeal and affordability. However, they require regular maintenance to prevent rot and insect damage. Pressure-treated posts last longer than untreated ones but are still susceptible to these issues over time.

Pros: Inexpensive, easy to work with, and blend well with wooden decking.

Composite Deck Posts

Composite deck posts are made from a combination of recycled plastic and wood fibers. They're resistant to rot, decay, and insect damage, making them low-maintenance options.

Pros: Last longer than wooden posts, require minimal maintenance, and are eco-friendly. However, they're more expensive than wooden posts.

Understanding the different types of deck support ensures that the right materials are used, enhancing the longevity, safety, and aesthetic appeal of the deck. Always consult local building codes and hire experienced professionals when in doubt to ensure a successful and structurally sound deck construction project.