What two things must be known prior to rigging for a lift?

For rigging a lift, it is essential to know both the load weight and the angle involved. The load weight is critical as it determines the total loading on the rigging system, which helps in selecting appropriate equipment and ensuring safety during the lift. The angle involved, particularly in slings or when using multiple lifting points, affects the distribution of forces on the rigging equipment and must be considered to prevent excessive stress that could lead to failure. Understanding these two factors allows for the safe and effective execution of the lift, ensuring that the rigging system is properly designed and used according to industry standards and safety regulations.