![]() This exposes above-ceiling sprinklers to rising heat and allows sprinklers to activate without interference. When exposed to sufficient heat, the vinyl panels soften, sag, and fall out of a standard metal ceiling grid. They are made from thermoformed vinyl just 0.013- or 0.030-in. TFCs overcome these limitations, justifying a re-examination of drop-out ceilings. EPS ceilings have many limitations, however, that have discouraged specifiers from considering drop-out ceilings in the past. The thermal insulation properties of EPS make it useful in cold-storage facilities where they enable wet pipe fire sprinkler systems to be installed above rooms with freezing temperatures. Most drop-out ceilings are made from either expanded polystyrene (EPS) foam or are thermoformed ceiling (TFC) panels. A suspended ceiling system, which is installed below the sprinklers, with listed translucent or opaque panels that are heat-sensitive and fall from their setting when exposed to heat.ĭrop-out ceiling systems have been in use since the development in the mid-20th century of modern suspended ceiling systems and suitable plastics.
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