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  2. Shoring - Wikipedia

    en.wikipedia.org/wiki/Shoring

    Soil nailing is a technique in which soil slopes, excavations or retaining walls are reinforced by the insertion of relatively slender elements – normally steel reinforcing bars. The bars are usually installed into a pre-drilled hole and then grouted into place or drilled and grouted simultaneously.

  3. Gastrointestinal perforation - Wikipedia

    en.wikipedia.org/wiki/Gastrointestinal_perforation

    The gastrointestinal wall is composed of four layers surrounding a central lumen. Gastrointestinal perforation is defined by a full-thickness injury to all layers of the gastrointestinal wall, resulting in a hole in the hollow GI tract (esophagus, stomach, small intestine, or large intestine). A hole can occur due to direct mechanical injury or ...

  4. 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 ...

  5. Firewall (construction) - Wikipedia

    en.wikipedia.org/wiki/Firewall_(construction)

    Penetrations (holes) must not defeat the structural integrity of the wall, such that the wall cannot withstand the prescribed fire duration without threat of collapse. [ 8 ] Openings – Other openings in fire walls, such as doors and windows, must also be fire-rated fire door assemblies and fire window assemblies .

  6. Schools tell BBC about 'astronomical' bills as 25-year repair ...

    www.aol.com/news/schools-tell-bbc-astronomical...

    There was a hole in the ceiling and the wall was damp to touch. The BBC has seen evidence the school has spent years chasing this and other repairs, which under the terms of the maintenance ...

  7. Flashing (weatherproofing) - Wikipedia

    en.wikipedia.org/wiki/Flashing_(weatherproofing)

    Shaped like a “U” or channel to catch water (e.g., where the edge of a tile roof meets a wall). Through wall flashing Spans the thickness of the wall and directs water to weep holes. Cap flashing (drip cap) Often used above windows and doors. Drip edge A metal used at the edges of a roof. Step flashing (soaker, base flashing)

  8. Manhole - Wikipedia

    en.wikipedia.org/wiki/Manhole

    A manhole (utility hole, maintenance hole, [1] or sewer hole) is an opening to a confined space such as a shaft, utility vault, or large vessel. Manholes, typically protected by a manhole cover , are often used as an access point for an underground public utility , allowing inspection, maintenance, and system upgrades.

  9. Abdominal wall defect - Wikipedia

    en.wikipedia.org/wiki/Abdominal_wall_defect

    Abdominal wall defects are a type of congenital defect that allows the stomach, the intestines, or other organs to protrude through an unusual opening that forms on the abdomen. [ 1 ] [ 2 ] During the development of the fetus, many unexpected changes occur inside the womb.

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