The 30 deg angle fixed length, factory engineered Horizontal Lifeline System is for use by 3 workers in fall restraint or 2 in fall arrest. This system is available in a 20 ft kit with or without a carry bag. This 3rd party engineered horizontal line kit is a cost-effective way to have multiple workers on the roof with room to move freely. Engineering standards specify that a horizontal lifeline without an energy absorbing device subjected to fall hazards must have a 30 deg anchors between anchorage points. Super Anchor Safety fixed length horizontal lifelines, when used with our specified anchorage devices provide an engineered system for rafter spacing of 10 ft up to 20 ft. For accurate rigging, each fixed length horizontal lifeline is labeled for the correct rafter spacing.