170 mm thick partition composed by 1 x 12,5 mm PregyPlac BA13 as inner layer + 1 x 12,5 mm LaDura Plus BA13 as outer layer on each side and 1 x 12,5 mm LaDura Plus BA13 in the cavity, fixed to galvanized steel frame made of double row of 40-50-40 mm horizontal U tracks and 47-49-50 mm vertical C studs.