By john. Floor. Published at Friday, October 12th, 2018 - 01:45:29 AM.
Nightingale floors are floors that make a chirping sound when walked upon. These floors were used in the hallways of some temples and palaces, the most famous example being Nijō Castle, in Kyoto, Japan. Dry boards naturally creak under pressure, but these floors were built in a way that the flooring nails rub against a jacket or clamp, causing chirping noises. It is unclear if the design was intentional. It seems that, at least initially, the effect arose by chance. An information sign in Nijō castle states that The singing sound is not actually intentional, stemming rather from the movement of nails against clumps in the floor caused by wear and tear over the years. Legend has it that the squeaking floors were used as a security device, assuring that none could sneak through the corridors undetected.
Metal whiskers Raised floors and other metal structures such as cable trays and ventilation ducts have caused many problems with zinc whiskers in the past, and likely are still present in many data centers. This happens when microscopic metallic filaments form on metals such as zinc or tin that protect many metal structures and electronic components from corrosion. Maintenance on a raised floor or installing of cable etc. can dislodge the whiskers, which enter the airflow and may short circuit server components or power supplies, sometimes through a high current metal vapor plasma arc. This phenomenon is not unique to data centers, and has also caused catastrophic failures of satellites and military hardware.
Raised Floor Design This type of floor consists of a gridded metal framework or substructure of adjustable-height supports (called pedestals) that provide support for removable (liftable) floor panels, which are usually 2×2 feet or 60×60 cm. The height of the legs/pedestals is dictated by the volume of cables and other services provided beneath, but typically arranged for a clearance of at least six inches or 15 cm with typical heights between 24 inches to 48 inches.
Raised Floor Design Additionally, when buildings are designed to combine modular electrical, modular walls, and access floor, the space within the building can be reconfigured in a few hours, as compared to historical means of demolishing walls and drilling holes in the floor to route electrical and other services. As more companies construct or renovate buildings to meet LEED (Leadership in Energy & Environmental Design) underfloor air and access floor usage will continue to grow.
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