What is the "raise load" hand signal?

The hand signal for "raise load" is represented by raising one arm with fingers pointed upward. This signal is effective because it is clear and easily identifiable from a distance, making it easy for the crane operator and other personnel to understand the intended action without confusion. The upward motion of the arm conveys the message to lift the load vertically, which is crucial for the safety and efficiency of lifting operations.

Using one arm instead of both allows the operator to maintain a better view of the surroundings and other signals, which is important in ensuring a safe working environment. This single-arm signal also minimizes the chance of misunderstanding, as it is a widely accepted standard in crane operation signaling, contributing to consistent communication among team members.

The other options do not accurately represent the established signaling method for raising a load, which could lead to potential safety hazards on the job site.