Picture of a Dock Hardware Pile Hoop Roller Assembly.

How to Attach a Floating Dock to a Piling

Dock Building Tips

A floating dock has to do two contradictory things — move freely up and down with the water, and stay exactly where you put it. Pilings solve both, but the piling isn't the part that matters. The connection is. Here's how pile hoops work, the two-inch clearance rule nobody publishes, and what happens when a roller seizes.