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2. Floodgate - Wikipedia

   en.wikipedia.org/wiki/Floodgate

   Radial gates are rotary gates consisting of cylindrical sections. They may rotate vertically or horizontally. Tainter gates are a vertical design that rotates up to allow water to pass underneath. Low friction trunnion bearings, along with a face shape that balances hydrostatic forces, allow this design to close under its own weight as a safety ...

3. Tainter gate - Wikipedia

   en.wikipedia.org/wiki/Tainter_gate

   Tainter gates are usually controlled from above with a chain/gearbox/electric motor assembly. A critical factor in Tainter gate design is the amount of stress transferred from the skinplate through the radial arms and to the trunnion, with calculations pertaining to the resulting friction encountered when raising or lowering the gate. Some ...

4. Maeslantkering - Wikipedia

   en.wikipedia.org/wiki/Maeslantkering

   Then, the two 22-metre high and 210-metre long steel gates were built. After this, 237-metre long steel trusses were welded to the gates. The arms weigh 6,800 tonnes each. [3] The main purpose of the arms is transmitting the immense forces, exerted on the gates while closed, to one single joint at the rear of each gate.

5. Gatepost - Wikipedia

   en.wikipedia.org/wiki/Gatepost

   The gates themselves could be wood or more commonly cast iron, wrought iron or mild steel. A large number of the cast-iron gates were removed by the Ministry of Works in World War II to be melted down and used to build weapons, etc. Once removed these gates were rarely replaced.

6. 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.

7. Chain-link fencing - Wikipedia

   en.wikipedia.org/wiki/Chain-link_fencing

   Chain-link fencing showing the diamond patterning A chain-link fence bordering a residential property. A chain-link fence (also referred to as wire netting, wire-mesh fence, chain-wire fence, cyclone fence, hurricane fence, or diamond-mesh fence) is a type of woven fence usually made from galvanized or linear low-density polyethylene-coated steel wire.