In cases where the panel sheet is to be used as a mounting method, the sheet thickness is important. The minimum sheet thickness within the shock damping capability of the lifeline system is determined according to the manufacturer’s instructions. In the installation of XTR Safety panel anchors, a minimum thickness of 0.7 mm for aluminum type roofs and 0.5 mm for steel roofs is required for sandwich panels. For trapezoidal type roofs, a thickness of 1 mm is required if it is aluminum and 0.7 mm if it is steel.