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  2. Silt fence - Wikipedia

    en.wikipedia.org/wiki/Silt_fence

    Silt fence installed up-slope of a vegetated stream buffer. A silt fence, sometimes (misleadingly) called a filter fence, [1] is a temporary sediment control device used on construction sites to protect water quality in nearby streams, rivers, lakes and seas from sediment (loose soil) in stormwater runoff.

  3. Dutchman (repair) - Wikipedia

    en.wikipedia.org/wiki/Dutchman_(repair)

    A rail repair dutchman is typically a 4–6-inch (100–150 mm) long piece of rail that is cut in advance for the purpose and carried by a section crew. If the gang finds a rail with a chipped or broken end, they remove the connector plates ( fishplates ), cut out the damaged section, replace it with the dutchman, and bolt the connectors back ...

  4. Formwork - Wikipedia

    en.wikipedia.org/wiki/Formwork

    For removable forms, once the concrete has been poured into formwork and has set (or cured), the formwork is struck or stripped to expose the finished concrete. The time between pouring and stripping depends on the job specifications, which include the cure required, and whether the form is supporting any weight; it is usually at least 24 hours ...

  5. Temporary fencing - Wikipedia

    en.wikipedia.org/wiki/Temporary_fencing

    Fence panels are commonly constructed of either chain link or weld mesh. Temporary fencing in storage on a site in Switzerland . Temporary fencing is an alternative to its permanent counterpart when a fence is required on an interim basis when needed for storage, public safety or security, crowd control , or theft deterrence.

  6. Fence - Wikipedia

    en.wikipedia.org/wiki/Fence

    A fence is a structure that encloses an area, typically outdoors, and is usually constructed from posts that are connected by boards, wire, rails or netting. [1] A fence differs from a wall in not having a solid foundation along its whole length. [2] Alternatives to fencing include a ditch (sometimes filled with water, forming a moat).

  7. Glossary of prestressed concrete terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_prestressed...

    A method of prestressing concrete where the tendons are tensioned before the concrete is placed. [1]: 51 post-tensioning post-tensioned A method of prestressing concrete where the tendons are tensioned after the concrete has attained a specified minimum strength or age. [1]: 50 prestress level

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  9. Concrete cover - Wikipedia

    en.wikipedia.org/wiki/Concrete_cover

    Concrete cover, in reinforced concrete, is the least distance between the surface of embedded reinforcement and the outer surface of the concrete (ACI 130). The concrete cover depth can be measured with a cover meter. The purpose of concrete cover is to protect the reinforcement from corrosion, fire, and other potential damage.

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