Why is it essential to calculate the 'swing fall' distance when using a horizontal lifeline on a tower?

Calculating the swing fall distance when using a horizontal lifeline on a tower is essential because a swing fall can significantly increase the severity of a fall and the likelihood of serious injury or death. A swing fall occurs when a worker falls horizontally away from the anchor point of the horizontal lifeline before the fall arrest system engages. This creates a pendulum-like swing motion. The swing fall distance is the horizontal distance the worker travels during this swing. The danger arises because the swing can cause the worker to collide with the tower structure or other obstacles with considerable force. Furthermore, the increased distance of the fall can result in a longer freefall distance and a greater impact force when the fall is arrested. By calculating the potential swing fall distance, safety professionals can determine the appropriate placement of anchor points on the horizontal lifeline to minimize the swing hazard and ensure adequate clearance from obstructions.