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  2. Flood opening - Wikipedia

    en.wikipedia.org/wiki/Flood_opening

    Most regulatory authorities in the United States that offer requirements for flood openings define two major classes of opening: [1] engineered, and non-engineered. The requirements for non-engineered openings are typically stricter, defining necessary characteristics for aspects ranging from overall size of each opening, to allowable screening or other coverage options, to number and ...

  3. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    Cost of materials, ease of installation, and resistance to corrosion all have come to favor Schedule 40 PVC DWV systems, which are replacing cast iron "hub" and "no-hub" DWV systems in many municipalities, while parts and skills associated with installing and maintaining cast iron systems are becoming increasingly scarce and costly.

  4. Alcoa Care-free Homes - Wikipedia

    en.wikipedia.org/wiki/Alcoa_Care-free_Homes

    [14] [15] The company was sued for misrepresentation of costs to build the homes, with ALCOA claiming costs to build up to $34,000 and selling prices of $50,000 while Associated Contractors Inc., claiming true costs to build the homes were $63,612 with the highest selling price $32,419. [16]

  5. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Ventilation on the downdraught system, by impulsion, or the 'plenum' principle, applied to schoolrooms (1899) Natural ventilation is the ventilation of a building with outside air without using fans or other mechanical systems. It can be via operable windows, louvers, or trickle vents when spaces are small and the architecture permits.

  6. Alcoa - Wikipedia

    en.wikipedia.org/wiki/Alcoa

    [15] By the end of World War I Alcoa's New Kensington facility accounted for 3,292 workers—a fifth of the local population—and covered over 1 million square feet of manufacturing space on 75 acres. [14] The war enabled Alcoa to increase production by 40% and to export some ninety million pounds to the Western Allies. [15]

  7. Gable - Wikipedia

    en.wikipedia.org/wiki/Gable

    The term gable wall or gable end more commonly refers to the entire wall, including the gable and the wall below it. Some types of roof do not have a gable (for example hip roofs do not). One common type of roof with gables, the ' gable roof ', is named after its prominent gables.

  8. Stepped gable - Wikipedia

    en.wikipedia.org/wiki/Stepped_gable

    A stepped gable, crow-stepped gable, or corbie step [1] is a stairstep type of design at the top of the triangular gable-end of a building. [ 1 ] [ 2 ] The top of the parapet wall projects above the roofline and the top of the brick or stone wall is stacked in a step pattern above the roof as a decoration and as a convenient way to finish the ...

  9. Dutch gable - Wikipedia

    en.wikipedia.org/wiki/Dutch_gable

    A Dutch gable or Flemish gable is a gable whose sides have a shape made up of one or more curves and which has a pediment at the top. The gable may be an entirely decorative projection above a flat section of roof line, or may be the termination of a roof, like a normal gable (the picture of Montacute House, right, shows both types).

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