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2. Bridge protection systems - Wikipedia

   en.wikipedia.org/wiki/Bridge_protection_systems

   Pile-supported fender system on the James P. Houlihan Memorial Bridge. Fender systems attached to the pier with the goal to absorb the vessel impact. Their ability to withstand a typical ship collision is low. Fenders are built using a variety of materials: [8] thin-walled concrete box; thin-walled steel membrane steel; rubber.

3. Phoenician joint - Wikipedia

   en.wikipedia.org/wiki/Phoenician_joint

   A Phoenician joint (Latin: coagmenta punicana) is a locked mortise and tenon wood joinery technique used in shipbuilding to fasten watercraft hulls.The locked (or pegged) mortise and tenon technique consists of cutting a mortise, or socket, into the edges of two planks and fastening them together with a rectangular wooden knob.

4. Treenail - Wikipedia

   en.wikipedia.org/wiki/Treenail

   A treenail, also trenail, trennel, or trunnel, is a wooden peg, pin, or dowel used to fasten pieces of wood together, especially in timber frames, covered bridges, wooden shipbuilding and boat building. [1] It is driven into a hole bored through two (or more) pieces of structural wood (mortise and tenon).

5. Caisson (lock gate) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(lock_gate)

   Ship caisson at Droogdok Jan Blanken at Hellevoetsluis. A caisson is a form of lock gate.It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock.

6. Ballard Locks - Wikipedia

   en.wikipedia.org/wiki/Ballard_Locks

   The Chittenden Locks shortly after their construction. The Carl P. English Gardens had not yet been started. The inset shows the nearby Fishermen's Terminal. The complex includes two locks. [2]: 8 Using the small lock when boat traffic is low conserves fresh water during summer, when the lakes receive less inflow. Having two locks also allows ...

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