Sometimes the window frames are not strong enough to take the blast load. (see glass problems video- frames fail). Lifeline is a patented system that attached two or more catch cords to the surrounding masonery or metalwork. Lifeline is used with daylight applied window films and can be used in a horozontal or vertical plane. Lifeline works by allowing the daylight edge to fail and enter the room. The lifeline catches the glass and throws the pane back outside the building. Lifeline is quick to install and can be used to upgrade the performance of existing window film applications.