floating bridge

Bridge whose deck rests on pontoons that can be taken apart to open the bridge.
floating bridge 						Chest-high barrier on each side of the deck, preventing people and vehicles from falling off.				  							Floating caisson filled with air and supporting the deck.

manrope

Chest-high barrier on each side of the deck, preventing people and vehicles from falling off.

pontoon

Floating caisson filled with air and supporting the deck.