Deceleration Distance

Deceleration Distance: The additional vertical distance a falling employee travels, excluding lifeline elongation and free fall length, before stopping, from the point at which the safety device begins to operate. The device is for fall protection. It is measured as the distance between the location of an employee’s body belt or body harness attachment point at the moment of activation (at the onset of fall arrest forces) of the deceleration device during a fall, and the location of that attachment point after the employee comes to a full stop. SOURCE: OSHA

Fall avoidance is a big safety concern for any industry.

Deceleration Distance
Construction worker wearing safety harness and safety line working on construction


Horizontal lifeline fall protection systems (HLL systems) provide constant protection to the individual working at elevation, such as loading trucks and railcars or working on a roof. A horizontal lifeline consists of a cable attached to two or more anchor points on a roof-top, crane runway, bridge or outdoor construction site, or any other elevated work area. Horizontal lifelines may be attached in any way levels with floor-level, wall mount, or overhead mounting options and can adapt corners and various building shapes.

Engineered Horizontal Lifeline Personal Fall Protection Systems