Pontoon Bridge

A foundation that floats

The Pontoon Bridge is a structure from the Primitive+ DLC of ARK: Survival Evolved, described in game as "A primitive floating bridge that can be placed in water." It acts as a foundation on water: walls, ceilings and similar pieces can go on it, but only where the bridge sits directly beneath them.

Placing pontoons

• The bridge must sit in water without touching the ground.
• Once the first one is down, more can snap along it in a line, given enough room and open water.
• It can join other foundations in the water. The wiki also says floor foundations lowered on pillars aboard a Raft let a Pontoon Bridge connect to that Raft.
• It supports up to two ceilings out on the x and y axes and 1 ceiling diagonally, but the farthest ceilings will not hold walls.
• If it is destroyed, pieces that depend on it fall too, and demolishing refunds nothing for them.

Crafting cost

The engram unlocks at level 46 for 6 engram points. One pontoon costs 75 Q+ Lumber, 20 Iron Ingot (Primitive Plus) and 4 Cementing Paste. Crafting takes 4 seconds and gives 8 XP. Each weighs 4 and they stack to 100, for 400 per full stack.