4' x 2" x 2" Square Aluminum Dock Post with 1/8" wall thickness 

Our 2" x 2" Aluminum Dock Post is a lightweight, corrosion-resistant support option designed specifically for residential dock systems and waterfront structures. Manufactured from marine-grade aluminum, this post provides excellent resistance to corrosion, a smooth exterior finish, and reliable performance for seasonal or year-round dock installations.

This square-profile post offers improved resistance to twisting, racking, and lateral movement when compared to traditional round pipe legs. Its rigid, maintenance-free construction will not rust, rot, or degrade—making it a long-lasting alternative to steel or treated lumber dock supports.

Ideal for freestanding dock legs in water depths up to approximately 7–9 feet (with proper bracing on taller installations), as well as platforms, walkways, and general waterfront structural applications.

Key Features

• 2" x 2" square 6063-T5 aluminum tubing with 0.125" wall for solid residential dock support
• Smoother surface finish than 6061—ideal for visible dock components
• Corrosion-proof and maintenance-free, designed for harsh freshwater or coastal environments
• Square shape resists twisting and sway better than round pipe legs
• Lightweight material makes seasonal installation and removal easier
• Easy to cut, drill, and modify with standard tools
• Compatible with most dock footpads, mud plates, and adjustable bracket systems

Common Applications

• Freestanding residential dock legs (1–9 ft depth ranges)
• Support posts for platforms, piers, and walkways
• Dock repairs and custom dock builds
• Ramps, gangways, and shoreline access structures