This 3′ x 20′ aluminum gangway with railings is attached to the deck with our Abutment Angle Hinge kit. The gangway roller on the dockside allows the gangway to move forward and back with the fluctuating water level. The Thruflow brown decking is non-slip in wet or dry conditions. The dock is (2) 60″ x 120″ dock sections moored in place with 4 poles with augers.