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Trimax Structual Lumber
Solutions you can build on!

Trimax structural lumber is a high performance construction material ideal for load bearing applications such as posts, beams, joists used in decks, docks and marinas.


Trimax is made of a patented formula of recycled plastic (HDPE) and fiberfill. It is uniquely suited for outdoor applications such as deck substructures, docks and marinas, that require superior strength, durability and resistance to extreme weather conditions.


Looks like wood without all the upkeep.

Long Lasting

When you use Trimax Structural Lumber you'll only have to build it once. Trimax is impervious to moisture, insects, fungi, marine borers, oils and fuels.

Low Maintenance

Trimax requires no sanding, painting, staining or sealing. Trimax is resitant to fading.

Easy To Handle

Trimax Structural Lumber installs and cuts like natural wood, although predrilling is recommended. Boards will not rot, split, splinter, check or stain. Conventional carpentry tools and methods are all you will need.

Environmentally Friendly & Safe

Trimax Structual Lumber is an ecologically sound alternative to pressure-treated lumber. Trimax contains no arsenic or other toxic chemicals. Trimax is made of recycled materials and is itself recyclable.

Best Warranty In The Business

Trimax Structural Lumber has a Limited Lifetime warranty, no other product has this offer.

Trimax Colors

Steel Gray is our standard stocking color. The custom colors above are available on a special request basis.

Technical Data


Ideal for Many Applications

  • Structural posts, beams and joists
  • Docks and seawalls
  • Structural Pilings
  • Boardwalks and beach access walks
  • Dock fenders
  • Marine and pedestrian bridges
  • Channel markers
  • Wales, camels and guard rails

Trimax Woodgrain

Trimax Joists

Trimax Sizes

Trimax Sizes

Large Profiles Technical Data

Installation Instructions