SDI 114 is no longer published as an SDI performance standard. The new SDI standard for acoustical Performance is SDI 128-09
Steelcraft does offer products that have been tested in accordance with SDI 128-09 and per ASTM E90 "Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements" and calculated per ASTM E413 "Classification for Rating Sound Insulation"
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