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  2. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    Concrete will need to be poured to surround the trench drain so that the load can be transferred from the channel and grate to the surrounding areas. Pre-cast trench drains generally come in 4-inch (100 mm) widths but can range anywhere from a 1.75-inch (44 mm) slot to 2-inch (51 mm) wide channels with grates, and up to any size imaginable ...

  3. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A round manhole and its cover. A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.

  4. EJ (company) - Wikipedia

    en.wikipedia.org/wiki/EJ_(company)

    EJ Group, formerly East Jordan Iron Works, is an American manufacturer of iron products, headquartered in East Jordan, Michigan.The company manufactures and distributes iron construction castings (Municipal castings), fabricated products, composite products, water distribution solutions, and other infrastructure access products for water, sewer, drainage, telecommunications, and utility ...

  5. Slot drain - Wikipedia

    en.wikipedia.org/wiki/Slot_drain

    The grates increase the risk of personal injury and result in lost time. The slot drain concept was first introduced to solve such problems. By eliminating the needs for grates, there is no concern about breaking. The concrete sustains most of the weight and the slot opening is usually only 0.5 to 1.5 inches (1 to 4 cm). Capacity of evacuating ...

  6. Cattle grid - Wikipedia

    en.wikipedia.org/wiki/Cattle_grid

    A cattle grid on a country road in the Yorkshire Dales Cattle grid on a railway line in northeastern New Mexico Cattle grid in Galong, Australia. A cattle grid – also known as a stock grid in Australia; cattle guard, or cattle grate in American English; vehicle pass, or stock gap in the Southeastern United States; [1] Texas gate in western Canada and the northwestern United States; [2] and a ...

  7. Trench shield - Wikipedia

    en.wikipedia.org/wiki/Trench_shield

    A shield should not be confused with a shore. While they may serve a similar function, trench shoring is a different physical application that holds up the walls of a trench to prevent collapse. [1] In the US, use of a trench shield is governed by OSHA 29 CFR Part 1926.650-.652 Subpart P-Excavations.

  8. Grating - Wikipedia

    en.wikipedia.org/wiki/Grating

    A grating is any regularly spaced collection of essentially identical, parallel, elongated elements.Gratings usually consist of a single set of elongated elements, but can consist of two sets, in which case the second set is usually perpendicular to the first (as illustrated). [1]

  9. Trench - Wikipedia

    en.wikipedia.org/wiki/Trench

    The risk of cave-in increases from surcharge load, which is any weight placed outside the trench near its edge. These loads include the spoil pile (soil excavated from the trench) or heavy equipment. These add extra stress to the walls of the trench. Inability to escape the trench because of steep and unstable walls, which may be difficult to ...

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