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. Mineral wool 40 + 40 mm thick in the cavity. According to fire classification report, both mineral glass wool and rock wool are permitted as insulation. Maximum height for fire rated partition is 4,00 m.