Identifying the center of gravity—especially for asymmetrical loads—and positioning equipment for balanced weight distribution. Essential Technical Notes & Formulas
To determine net capacity, you must deduct the weight of the main hook block, headache ball, all rigging hardware (slings, shackles, spreader bars), and the stowed or erected jib from the crane's gross capacity. Ground Conditions and Outriggers Cranes must be set up on firm, level ground. rigger level 3 aramco notes
Level 3 riggers cannot supervise lifts exceeding 40 tons, tandem lifts (using two or more cranes), night lifts, lifts over live hydrocarbon lines, or personnel lifting via crane-suspended baskets. These require a Level 1 or Level 2 Rigger. The Rigger’s Core Responsibilities Level 3 riggers cannot supervise lifts exceeding 40
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