Skylotec 20m Temporary Horizontal Lifeline L-0329Temporary horizontal securing systems are very popular for assembly work in steel construction, scaffolding and construction in general. LIFELINE HORIZONTAL is a transportable, very quick to assemble and flexible slinging device. It allows two people to work safely over a distance of up to 20 metres. The system's two carabiners are attached to suitable structures such as steel girders, scaffolding frames or concrete columns using slings, for example.