When must rigging equipment for material handling be inspected?

Rigging equipment for material handling is critical for ensuring safety on construction sites, and the correct answer highlights the necessary inspection frequency that reflects this importance. Inspecting rigging equipment before each shift ensures that it is in good working condition and safe to use. This principle is grounded in OSHA regulations which mandate that equipment must be inspected regularly to prevent accidents and injuries.

The requirement to also inspect rigging equipment "as necessary" allows for flexibility, acknowledging that during a shift, conditions may change that could affect the safety of the equipment, such as signs of wear or damage. Regular and situational inspections help ensure that any potential issues are caught early, thereby reducing the risk of failures during use.

The other options suggest inspection periods that do not align with the dynamic nature of construction work, where conditions can change rapidly. For example, inspecting only weekly or monthly may overlook critical safety issues that arise in-between those intervals, leading to increased risks. Therefore, the focus on inspections before each shift, combined with the necessity for additional checks as situations arise, reflects best practices in maintaining safety standards in construction environments.