Before installing a horizontal lifeline, if this is certified to European standards EN-795:C and TS 14.615, the following calculation must first be made.
The aim of this prior calculation is to determine:
The fall clearance required to arrest the fall will be determined by:
The fall arrest forces for which the lifeline has been calculated mean that the fastenings of its various components are critical.
This is due to the fact that, in addition to the cable deflection generated by the fall, the cable itself tends to have a force multiplying effect on the curves and end points. This is known as the cable multiplying effect.
Therefore, the force applied to the lifeline ends and curves will not be the maximum force of 6kN required by the standards governing the PPE for the point at which the fall occurs, instead this force may be several times multiplied up to the ends.