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  2. Defensible space (fire control) - Wikipedia

    en.wikipedia.org/wiki/Defensible_space_(fire...

    A defensible space, in the context of fire control, is a natural or landscaped area around a structure that has been maintained and designed to reduce fire danger. The practice is sometimes called firescaping. [1] "Defensible space" is also used in the context of wildfires, especially in the wildland-urban interface (WUI). [2]

  3. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    The primary grid types are "Standard 1" (15 ⁄ 16-inch face), Slimline (9 ⁄ 16-inch grid), and concealed grid. In the United States and its neighboring countries, the cell size in the suspension grids is typically either 2 by 2 feet (610 mm × 610 mm) or 2 by 4 feet (610 mm × 1,220 mm), and the ceiling tiles, light fixtures, and fluorescent ...

  4. National Fire Protection Association - Wikipedia

    en.wikipedia.org/wiki/National_Fire_Protection...

    The committee's initial report evolved into NFPA 13, Standard for the Installation of Sprinkler Systems, the most widely used fire sprinkler standard. [ 6 ] Around 1904, the NFPA began to expand its membership from affiliates of fire insurance companies to many other organizations and individuals, and also expanded its mission beyond ...

  5. Fire sprinkler - Wikipedia

    en.wikipedia.org/wiki/Fire_sprinkler

    The 2002 edition of the NFPA #13 standard, section 3.6.1 defines quick response sprinklers as having a response time index (RTI) of 50 (meter-seconds) 1/2 or less. RTI is a measure of how thermally responsive the heat-responsive element of the sprinkler is, measured as the time needed to raise the temperature of the sprinkler bulb to 63% of the ...

  6. Life Safety Code - Wikipedia

    en.wikipedia.org/wiki/Life_Safety_Code

    The publication Life Safety Code, known as NFPA 101, is a consensus standard widely adopted in the United States. [according to whom?] It is administered, trademarked, copyrighted, and published by the National Fire Protection Association and, like many NFPA documents, is systematically revised on a three-year cycle.

  7. Common sleep medication may prevent brain from clearing 'waste'

    www.aol.com/common-sleep-medication-may-prevent...

    In a mouse study, researchers found that zolpidem (Ambien), a common sleep aid, could prevent the brain from effectively clearing up 'waste', though it remains unclear whether this could affect ...

  8. How close is humanity to self-destruction? Doomsday Clock ...

    www.aol.com/close-humanity-self-destruction...

    Each year for the past 78 years, the Bulletin of the Atomic Scientists has published a new Doomsday Clock, suggesting just how close – or far – humanity is to destroying itself.

  9. Confined space - Wikipedia

    en.wikipedia.org/wiki/Confined_space

    A confined space is a space with limited entry and egress and not suitable for human inhabitants. Alternative names for a confined space are enclosed space and dangerous space. [ 1 ] An example is the interior of a storage tank , occasionally entered by maintenance workers but not intended for human occupancy.