Iniö, Norrby Ferry Port

Design completed: 2024

Project: A port approx. 60 m long, composed of 7 heavy-duty concrete pontoons.

Client’s needs & design highlights:
The client requested a floating ferry port instead of a fixed structure, capable of handling passenger, vehicle, and cargo ferries with bow unloading. The Norrby port was designed for vessels up to 50 meters long and several hundred tons in weight. The structure allows two vessels to dock simultaneously.

The structural load rating of the floating pier is 350–400 tons. Thanks to its buoyant design, it can accommodate heavier traffic than traditional fixed piers – including vehicles over 20 tons. Vessels dock alongside the pier using reinforced mooring bollards. The port also serves as a home base for a fire and rescue vessel.

Conditions: Multibeam sonar imaging was used to assess seabed conditions. Erosion damage and artificial ridges from a previous port had to be considered. Shallow water near the shore influenced the anchoring design.

Safety: The pier includes a collision protection system and rescue equipment sets.

Sustainability: The design emphasizes durability and longevity. The open-bottom floating structure allows freer water flow than fixed piers. Ice movement in the harbor area was a key consideration.