What is the primary purpose of a rigger in construction?

The primary purpose of a rigger in construction is to safely lift, move, and position loads using cranes and other hoisting equipment. Riggers are responsible for ensuring that loads are rigged correctly and safely, which involves selecting appropriate rigging gear, understanding load limits, and using proper techniques to secure loads for lifting. This role is critical in preventing accidents and ensuring the safety of workers on a construction site.

While operating cranes and hoisting equipment is an essential aspect of the job, it is not the sole responsibility of a rigger. Instead, riggers focus on the preparation and securement of loads prior to movement. Supervision of construction workers and the design of construction plans for heavy loads are related to different roles within the construction industry and do not define the core responsibilities of a rigger. Thus, the main duty is clearly centered around the safe and effective handling of loads, which is captured in the correct answer.