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  2. Cellular floor raceways - Wikipedia

    en.wikipedia.org/wiki/Cellular_floor_raceways

    Cellular floor raceways are electrical wiring ducts or cells made from steel floor deck that serve as structural formwork for placement of concrete floor slabs and also as wire and cable raceways within the concrete floor slab.

  3. Raised floor - Wikipedia

    en.wikipedia.org/wiki/Raised_floor

    An alternative raised floor application with disposable formworks from job site in Turkey A suction-cup tile lifter has been used to remove a tile.. A raised floor (also raised flooring, access floor(ing), or raised-access computer floor) provides an elevated structural floor above a solid substrate (often a concrete slab) to create a hidden void for the passage of mechanical and electrical ...

  4. First fix and second fix - Wikipedia

    en.wikipedia.org/wiki/First_fix_and_second_fix

    This includes constructing walls, floors and ceilings, and inserting cables for electrical supply and pipes for water supply. Some argue that First Fix starts after the shell of the building is complete, and ends when the walls are plastered. Here is a list, in no particular order, of the elements of First Fix. Drain runs: must be downhill and ...

  5. Shop drawing - Wikipedia

    en.wikipedia.org/wiki/Shop_drawing

    Installation information will need to be reviewed with electrical and plumbing trades to coordinate third-party service connections. A shop drawing is a drawing or set of drawings produced by the contractor, supplier, manufacturer, subcontractor, consultants, or fabricator. [1] Shop drawings are typically required for prefabricated components.

  6. NEMA enclosure types - Wikipedia

    en.wikipedia.org/wiki/NEMA_enclosure_types

    Design depends on specified conditions of pressure and time; submersible in water or oil; used in quarries, mines, and manholes. 7 Certified and labelled for use in areas with specific hazardous conditions: for indoor use in Class I, Groups A, B, C, and D environments as defined in NFPA standards such as the NEC.

  7. Concrete - Wikipedia

    en.wikipedia.org/wiki/Concrete

    The world record for largest continuously poured concrete floor was completed 8 November 1997, in Louisville, Kentucky by design-build firm EXXCEL Project Management. The monolithic placement consisted of 225,000 square feet (20,900 m 2 ) of concrete placed in 30 hours, finished to a flatness tolerance of F F 54.60 and a levelness tolerance of ...

  8. Penetrant (mechanical, electrical, or structural) - Wikipedia

    en.wikipedia.org/wiki/Penetrant_(mechanical...

    Penetrants, or penetrating items, are the mechanical, electrical or structural items that pass through an opening in a wall or floor, such as pipes, electrical conduits, ducting, electrical cables and cable trays, or structural steel beams and columns. When these items pierce a wall or floor assembly, they create a space between the penetrant ...

  9. Pad-mounted transformer - Wikipedia

    en.wikipedia.org/wiki/Pad-mounted_transformer

    Single- and three-phase pad-mounted transformers are used in underground industrial and residential power distribution systems, where there is a need for safe, reliable, and aesthetically appealing transformer design. Their enclosed construction allows the installation of pad-mount transformers in public areas without protective fencing.