Durra acoustic demising wall systems are designed with support steel every 48" OC. A single layer of Durra panels replaces 2-3 layers of gypsum drywall. Nothing is sacrificed as Durra's line of acoustic demising walls include UL listed 1 and 2 hour fire rated designs. Want more bang for your buck? On your next theater, auditorium or sound-sensitive project, get more STC for your investment dollar with a Durra acoustic demising wall.