HORIZONTAL LIFELINE ENERGY ABSORBER - DBI-SALA Zorbit energy absorbers must only be used for single span horizontal lifeline applications. Multiple span systems using intermediate supports are not allowed. The maximum horizontal lifeline span length is 60 feet when using a single Zorbit HLL energy absorber, or 100 feet when a Zorbit HLL energy absorber is installed on each end of the system. The span length must be reduced when clearance is limited.