What does the term "wind load" refer to in rigging?

The term "wind load" refers to the additional force exerted by wind on a load. In rigging, understanding this concept is critical for ensuring safety and stability during lifts, especially in outdoor environments where wind conditions can be variable and unpredictable.

When a load is suspended or moved in windy conditions, the wind creates a lateral force on the load that can increase the total load exerted on lifting equipment such as cranes, hoists, or rigging gear. This force can affect the balance and stability of the load, potentially leading to dangerous situations if not properly accounted for. Consequently, rigging practices must include assessments of wind conditions to determine whether lifts can be conducted safely and to adjust for any additional rigging or securing measures to mitigate the risks posed by wind load.

In contrast, the other options refer to different factors that do not relate to wind pressures acting on loads—such as rain impact, weight distribution, or friction resistance—each of which plays a role in rigging but does not convey the specific hazards associated with wind loads.