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  2. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    For example, the invert of a street sewer connection could affect the feasibility of adding a toilet in the basement of a house. Conversely, the obvert level is the highest interior level, and can be considered the "ceiling" level, being the highest level of that sewer.

  3. Pile integrity test - Wikipedia

    en.wikipedia.org/wiki/Pile_integrity_test

    Pile integrity testing using low-strain tests such as the TDR (Transient Dynamic Response) method, is a rapid way of assessing the continuity and integrity of concrete piled foundations. The test measures: pile length, or depth to anomalies; pile head stiffness; pile shaft mobility, which is dependent on pile section and concrete properties

  4. Piling - Wikipedia

    en.wikipedia.org/wiki/Piling

    Both the diameter of the pile and the depth of the pile are highly specific to the ground conditions, loading conditions, and nature of the project. Pile depths may vary substantially across a project if the bearing layer is not level. Drilled piles can be tested using a variety of methods to verify the pile integrity during installation.

  5. Popcorn ceiling - Wikipedia

    en.wikipedia.org/wiki/Popcorn_ceiling

    Popcorn ceiling texture. A popcorn ceiling, also known as a stipple ceiling or acoustic ceiling, is a ceiling with one of a variety of spray-on or paint-on treatments. [1] The bumpy surface is created by tiny particles of vermiculite or polystyrene, which gives the ceiling sound-deadening properties. Mixtures are available in fine, medium, and ...

  6. Sleeve (construction) - Wikipedia

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

    Notice the sleeves, fastened to the timber forms before the concrete is cast. improper sleeving in a drywall assembly. In construction, a sleeve is used both by the electrical and mechanical trades to create a penetration in a solid wall, ceilling or floor.

  7. Caisson (engineering) - Wikipedia

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

    Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.

  8. Plenum space - Wikipedia

    en.wikipedia.org/wiki/Plenum_space

    Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum; however, some drop-ceiling designs create a tight seal that does not allow for airflow and therefore may not be considered a plenum air-handling space. [1] [2]

  9. Ceiling - Wikipedia

    en.wikipedia.org/wiki/Ceiling

    A ceiling can also be the upper limit of a tunnel. The most common type of ceiling is the dropped ceiling, [citation needed] which is suspended from structural elements above. Panels of drywall are fastened either directly to the ceiling joists or to a few layers of moisture-proof plywood which are then attached to the joists. Pipework or ducts ...