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Glossary | C
Glossary

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C

Classified

UL terminology for products that in and themselves have no listing or approval. Products that are UL classified have predictable ratings or performance only after installation in a construction condition similar to UL published designs.
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Combustible Penetrants

Pipes, cable, or other penetrants that may burn or melt out during a fire.
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Composite Sheet

Light weight, fire resistant panels for large openings where a neat, finished appearance is required.

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CPVC

Acronym for Post-Chlorinated Polyvinyl Chloride. A combustible thermoplastic resin used in the manufacture of certain nonmetallic pipes used primarily of sprinkler applications.
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Curtain Wall

A particular type of exterior wall construction generally used for modern high-rise buildings. Wall in non-loadbearing and usually constructed of metal and glass.
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