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  2. Portcullis - Wikipedia

    en.wikipedia.org/wiki/Portcullis

    A portcullis (from Old French porte coleice 'sliding gate') is a heavy, vertically closing gate typically found in medieval fortifications. [1] A portcullis gate is constructed of a latticed grille , made of wood or metal or both, which slides down grooves inset within each jamb of the gateway.

  3. Lock (water navigation) - Wikipedia

    en.wikipedia.org/wiki/Lock_(water_navigation)

    A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.

  4. Listed buildings in Dewsbury - Wikipedia

    en.wikipedia.org/wiki/Listed_buildings_in_Dewsbury

    Dewsbury is a town and an unparished area in the metropolitan borough of Kirklees, West Yorkshire, England. It contains 134 listed buildings that are recorded in the National Heritage List for England. Of these, two are listed at Grade I, the highest of the three grades, three are at Grade II*, the middle grade, and the others are at Grade II, the lowest grade. The list consists of the listed ...

  5. List of canal locks in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_canal_locks_in_the...

    Flight of six locks, in a quite ornate setting and including the UK's second deepest lock, [1] two pumping stations and several Grade II listed buildings. Bingley Five Rise Locks: Leeds and Liverpool Canal: grid reference: These staircase locks are the steepest flight of locks in the UK, with a gradient of about 1:5. Bow Locks: River Lee Navigation

  6. 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. Door ...

  7. Listed buildings in Lathom - Wikipedia

    en.wikipedia.org/wiki/Listed_buildings_in_Lathom

    The lock is on the Rufford branch of the Leeds and Liverpool Canal, it is in sandstone and has wooden gates. There are steps at the north end of west side, and a wooden footbridge over the lower entrance. [41] II: Wash-house building, Needless Inn Farm