Given that operable walls originated from a need to separate space acoustically, the industry is always seeking to improve the acoustical performance as reflected in the higher STC values being offered today. Operable wall panels at 3” nominal thickness usually top out at a maximum of 52 STC, while 4” nominal thickness panels with the same construction and materials can get as high as 56 STC lab test results, and will still be easy to grasp to move manually into position across your room. Operable wall engineering has evolved over the last several decades, and manufacturers have learned that given the identical panel, frame and substrate construction using identical materials, a 4” nominal thickness operable wall panel will perform better acoustically than a 3” nominal thickness panel, due to the increased plenum space between the two panel sides.
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