This month, we are sharing our quick step-by-step guide to installing a truss and platform system
dock. If you don’t have time to read the whole thing just yet, here’s a quick summary of the essentials:
dock. If you don’t have time to read the whole thing just yet, here’s a quick summary of the essentials:
1. Understanding Alumi-Span Trusses
Alumi-Span offers pre-assembled trusses in standard lengths from 8' to 20'. Trusses have to horizontal poles with built in diagonal bracing, so there is no need for blind legs under the dock. All adjustment can be made from the corners.
There are two types of trusses:
- Regular Trusses – Feature a pole at each end.
- 90-Degree Trusses – Have one pole and clamps rotated 90 degrees for attachment to cross-arms to run a platform 90-degrees or perpendicular to an outgoing dock.
2. Key Installation Steps (Fast and Simple!)
A. Positioning the Truss Correctly
- Ensure the center casting (#310A) is on top with the “V” shape pointing upward for maximum strength.
- Use large bottom plates to simplify installation and stabilize the trusses.
B. Assembling the Dock Platform
- Bring sections out one at time and place on truss.
- Securely bolt deck sections together for a firm fit.
- Use black plastic platform connectors for added stability.
C. Properly Placing Stringer Brackets
- Position stringer brackets correctly to prevent trusses from sticking out beyond the dock sections.
D. Securing the Trusses
- Firmly clamp both upper and lower truss clamps before applying weight.
- To adjust the height, loosen and re-secure both clamps as needed.
- To raise center, leave top clamp tight, loosen and raise only bottom clamp
Want to Learn How to Build a Boat Dock?
You can find both videos and paper instructions on how to build a boat dock on the Build Instructions page of our website!
If you’re ready to order dock parts, or even if you just have a question, you can contact Alumi-Span by calling 855-523-2444 or by submitting a contact form. We look forward to helping you achieve your custom boat dock!