EI 60 stand alone lining, 186 mm thick, composed by 2 x 18 mm thick PregyPlac BA18, fixed to galvanized steel frame made of 40-150-40 mm horizontal U tracks and 47-149-50 mm vertical C studs. Glass wool in the cavity. According to fire test report, fire from both side is allowed. In case of lack of horizontal joints between boards, glass wool insulation can be removed.