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  2. Headwall - Wikipedia

    en.wikipedia.org/wiki/Headwall

    In civil engineering, a headwall is a small retaining wall placed at the inlet or outlet of a stormwater pipe or culvert. [2] In medicine, a headwall is the wall at the head end of a hospital bedspace. The bed abuts this headwall perpendicularly, which is furnished with equipment such as regulators for supplemental oxygen, regulators for ...

  3. Culvert - Wikipedia

    en.wikipedia.org/wiki/Culvert

    Steel corrugated culvert with a drop on the exhaust end, northern Vermont. Culverts can be constructed of a variety of materials including cast-in-place or precast concrete (reinforced or non-reinforced), galvanized steel, aluminum, or plastic (typically high-density polyethylene). Two or more materials may be combined to form composite ...

  4. Drop structure - Wikipedia

    en.wikipedia.org/wiki/Drop_structure

    The vertical hard basin drop structure, also called a dissipation wall, is the basic type of drop structure.The vertical hard basin drop consists of a vertical cutoff wall, usually built of concrete, that is usually laid perpendicular to the stream flow, and an impact basin, not unlike a stream pool, to catch the discharged water.

  5. 10 Best Construction Materials Stocks To Buy Now - AOL

    www.aol.com/news/10-best-construction-materials...

    Forterra, Inc. (NYSE: FRTA) manufactures pipe and precast concrete products, provides portable precast bridges and drainage inlets, wing walls, headwalls, junction boxes, end parts of the pipe ...

  6. Flow device - Wikipedia

    en.wikipedia.org/wiki/Flow_device

    Successful pipe designs (e.g. Flexible Pond Leveler, Castor Master, Clemson Pond Leveler) achieve this by protecting the intake end of the pipe with a cylindrical fence enclosure. A beaver swimming along the outside of the fence enclosure is unable to hear or feel the flow of water into the pipe and cannot reach it to block it.

  7. Lassen Volcanic National Park Highway Historic District

    en.wikipedia.org/wiki/Lassen_Volcanic_National...

    A route was selected and final design work took place in 1923. There was considerable internal debate concerning the extent of the road network, and the plan was scaled back to allow for more back country. Construction began in 1925 on two sections in the southwest and northwest, intended to create a road on the eastern slopes of Lassen Peak ...

  8. Precast concrete - Wikipedia

    en.wikipedia.org/wiki/Precast_concrete

    The overall thickness of sandwich wall panels in commercial applications is typically 8 inches, but their designs are often customized to the application. In a typical 8-inch wall panel the concrete wythes are each 2-3/8 inches thick), sandwiching 3-1/4 inches of high R-value insulating foam. The interior and exterior wythes of concrete are ...

  9. Play Hearts Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/hearts

    Enjoy a classic game of Hearts and watch out for the Queen of Spades!