Cac ceiling attenuation class is a standard measurement of a ceiling system s ability to block sound between two closed spaces cac values of 35 or greater are recommended to achieve speech privacy. Armstrong ceilings uses 15 16 and 9 16 grid face suspension systems with 24 x 24 or 24 x 48 ceiling tiles. Armstrong world industries provides ceiling wall solutions to help in the design and construction of commercial buildings and residential spaces.
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