Engineered for Strength. Proven Under Load.

Deck Substructure

ProWood® treated lumber delivers the consistent performance professionals rely on for the substructure of a deck. Our treated joists, beams, posts, and stair stringers are engineered for strength, stability, and confidence under load. With reliable treatment standards and clear specifications, ProWood provides the foundation you need to build decks that stand up to weather, weight, and time.

Posts

ProWood® posts provide dependable vertical support for a wide range of outdoor construction needs, including decks, rail systems, fences, and related structures. Manufactured from quality wood and with treatment options for exterior exposure, these posts are built to resist rot, decay, and insect damage in demanding environments.

Posts

Joists

ProWood® joists are designed to provide dependable structural support for decks and other outdoor framing applications where strength and durability are critical. Pressure-treated for ground-contact use, these joists are built to resist rot, decay, and termite damage in demanding environments.

Joists

Stair Stringers & Treads

ProWood® stair stringers and step treads provide the structural reliability and finished appearance required for safe, durable outdoor stairs. Pressure treated for ground-contact and exterior exposure, these components are built to resist rot, decay, insects, and harsh weather conditions in residential and commercial applications.

Stair Stringers & Treads

Decking Hardware & Accessories

ProWood® decking hardware and accessories are designed to support efficient installation and long-term deck performance. From protective components that help reduce moisture exposure to hardware solutions that streamline fastening and layout, these products help crews work faster while maintaining consistent, professional results.

Decking Hardware & Accessories

Deck Substructure

The Right Wood for the Job

Treatment Methods
Applications
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A treated wood deck frame built out of TrueFrame Joists with a lake and trees in the background.