Open jetty

An open jetty is a piled marine structure whose deck stands clear above the water so waves and current pass underneath, reducing hydrodynamic load and sediment disruption compared with a solid mole or quay. The form is standard at oil, LNG, and bulk terminals, where a short loading platform is served by an approach trestle and flanked by breasting and mooring dolphins handling berthing and restraint of a long vessel. Piles take vertical and lateral loads to the seabed, sized for berthing reaction, mooring pull, wave and current force, and seismic action where relevant. Deck, piles, trestle, and fendering are designed to BS 6349-2 with PIANC berthing and mooring guidance.