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2. Caisson (lock gate) - Wikipedia

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

   Unlike the chevron gate, this bridge is straight and so may be used for vehicle traffic. [iii] Busy gates, such as for a canal lock, may have dock sides high enough that the caisson can run beneath them. In this case, the roadway on top of the caisson, or its approach ramps, is lowered to fit beneath. [8]

3. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   The hinges are mounted to the fixed side (known as the "hanging stile"), and the handle, lock, bolt or latch are mounted on the swinging side (known as the "latch stile"). Rails – Horizontal boards at the top, bottom, and optionally in the middle of a door that join the two stiles and split the door into two or more rows of panels.

4. Bank vault - Wikipedia

   en.wikipedia.org/wiki/Bank_vault

   The door mold differs from the panel molds because there is a hole for the lock and the door will be clad in stainless steel. Some manufacturers use the steel cladding as the mold and pour the concrete directly into it. Other manufacturers use a regular mold and screw the steel on after the panel is dry.

5. Door security - Wikipedia

   en.wikipedia.org/wiki/Door_security

   A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions.

6. Caisson lock - Wikipedia

   en.wikipedia.org/wiki/Caisson_lock

   The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...

7. Hinge - Wikipedia

   en.wikipedia.org/wiki/Hinge

   A barrel hinge consists of a sectional barrel (the knuckle) secured by a pivot. A barrel is simply a hollow cylinder. The vast majority of hinges operate on the barrel principle. [4] Butt hinge / Mortise hinge Any hinge designed to be set into a door frame and/or door is considered a butt hinge or mortise hinge. A hinge can also be made as a ...