Our story starts in 1956 inside Metalloy Foundry, run by mechanical engineer and boating enthusiast Dick Berlin. Back then, docks were heavy, rusty, and made of steel or iron. Dick saw a better way. He created an all-aluminum dock system — lighter, cleaner, and stronger than anything on the market. In fact, some of those very first docks are still out on the water today.
The Breakthrough That Changed Everything
Just a few years later, in 1961, Dick introduced what would become a defining moment for the dock industry: the F-stringer aluminum dock section. By combining F-shaped side beams with interlocking aluminum boards, he created a dock that wasn’t just lighter — it was smarter, safer, and more affordable.
People took notice:
- Alcoa recognized it as one of the best new aluminum products of the year
- It appeared in over 20 industry publications
- And soon, over 200 marinas across the northern states were carrying it
Competitors tried to copy the idea, but the original Alumi-Span system set the bar.
Learn How to Build a Boat Dock!
Ready to start building?
If you need tips on how to build a boat dock, we’ve got you covered! Click here for our installation videos. If you have questions or you’re ready to place an order, don’t hesitate to reach out to us at 855-523-2444 or through our online contact form. We look forward to helping you build an amazing dock!

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