The single most important decision for your new dock is the frame, which provides the structure, but the decking is just as crucial for dictating your long-term maintenance and comfort.
Every waterfront, from quiet lakes to corrosive saltwater, presents a unique challenge. That’s why you need to know the facts about Steel Truss, Steel Channel, Pressure-Treated Wood, zero-maintenance RPF (Reinforced Polymeric Framing), and lightweight Aluminum.
We’ve broken down the exact technical specs, pros, cons, and durability of all five major floating dock frame options so you can make a smart, confident investment.
1. Steel Truss Frame
If your needs demand maximum strength and stability, the Steel Truss frame is the industry standard. This frame is typically reserved for large marinas, high-traffic commercial applications, or locations exposed to rough water and ice movement.
The frame features a massive 12-inch-tall, fully welded construction using 1.5-inch angle iron. For unmatched rigidity, it includes mitered corners, internal gussets, and both horizontal and vertical supports. To fight the relentless battle against corrosion, every component is hot-dip galvanized, and it relies on heavy-duty 1/4-inch steel truss connecting hardware and 1/2-inch fasteners. For extreme applications, the angle iron can even be upgraded to 2 inches. Simply put, this frame is built to withstand almost anything.
2. Steel Channel Frame (The Simple Dock)
Often referred to as our "Simple Dock," the Steel Channel frame offers excellent durability and a sleek, lower profile look than the bulkier Truss frame. This makes it a popular choice for residential use where aesthetics and reliable strength are both priorities.
It’s constructed from strong 13-gauge steel channel. When assembled, internal and external hardware utilizing 3/16-inch and 1/4-inch material forms a fully boxed frame structure. The key difference from traditional galvanized steel is the ZAM coating used to prevent rust and corrosion, offering a modern, long-lasting defense. It utilizes our standard 1/4-inch galvanized wood dock connecting hardware and 3/8-inch fasteners to form a reliable structure.
3. Pressure-Treated Wood Frame
The Pressure-Treated Wood Dock is the classic, affordable foundation found on all bodies of water. It is the most common DIY option, offering a cost-effective route to waterfront access.
The standard structure is comprised of 2x8 and 2x6 pressure-treated lumber. It uses internal and external 1/4-inch galvanized wood dock hardware to form a solid, functional structure. While wood offers the lowest upfront cost, remember that it is not maintenance-free; it will require regular staining or sealing to protect the wood from the elements and maximize its lifespan. For applications that demand greater flotation or stiffness, the framing boards can easily be upgraded.
4. RPF (Reinforced Polymeric Framing)
For homeowners who want the attractive look of a wood dock but zero maintenance, the RPF (Reinforced Polymeric Framing) is the modern upgrade. This is the ultimate choice for a truly hassle-free dock system.
The frame is constructed from 2x8 and 1x6 structural composite boards. These advanced materials are designed to offer structural integrity and strength without the flaws of traditional lumber. Built with the same internal and external 1/4-inch galvanized wood dock hardware for a solid structure, these boards require no maintenance, are impervious to rot, mold, and insects, and offer a more upscale aesthetic that stays pristine year after year.
5. Aluminum Frame
The Aluminum Frame is highly valued for its fantastic strength-to-weight ratio, making it the best choice for seasonal docks or areas where installation and removal need to be easy.
This lightweight structure is built using 4, 5, or 6-inch-tall aluminum channel—the height chosen depends entirely on the required strength and water conditions. Aluminum is naturally corrosion-resistant and performs exceptionally well in both fresh and saltwater environments. It exclusively utilizes stainless steel connecting hardware and 1/2-inch fasteners, ensuring there are no incompatible metals to cause issues. If you need a dock that is easy to manage and lasts for decades, aluminum is the go-to.
Ready to build? Contact our dock experts today for a personalized quote and a final review of your waterfront needs!
