Rigger Level 3 Aramco Notes

Inspect wire rope, nylon web, and chain slings for broken wires, cuts, abrasion, or permanent elongation.

Doubles the capacity of the vertical hitch (200%), provided the sling legs remain strictly vertical ( 90∘90 raised to the composed with power to the horizontal). The Impact of Sling Angles

The sling cradles the load with both ends attached to the hoist hook. Full 200% capacity is only achieved if the sling legs remain completely vertical (90° to the horizontal plane). 4. Load Calculations and Sling Angles

Melting, charring, or weld splatter on any part of the sling surface.

Tension per Sling=Total Weight of the LoadNumber of Slings×LAFTension per Sling equals the fraction with numerator Total Weight of the Load and denominator Number of Slings end-fraction cross LAF 4. Hitch Configurations and Capacities rigger level 3 aramco notes

Authorized to handle general, routine, and non-critical lifts up to 40 tons. They must work under the supervision of a Rigger Level 1 or 2 for any critical lifts.

For all lifts >75% of crane’s rated capacity, a formal Lift Plan (Form SA-001) and a third-party engineer’s review are required.

SWL (in tons)=Diameter (in inches)2×8SWL (in tons) equals Diameter (in inches) squared cross 8 Example: A 1/2-inch wire rope has an approximate SWL of: 5. Basic Load Chart Interpretation

Identifying the center of gravity—especially for asymmetrical loads—and positioning equipment for balanced weight distribution. Essential Technical Notes & Formulas Inspect wire rope, nylon web, and chain slings

Reading and interpreting detailed Lift Plans and coordinating movements with crane operators using precise hand or radio signals.

Performing thorough pre-use inspections of all lifting accessories like slings, shackles, and hooks to identify defects.

Know the exact rejection criteria for slings and hardware.

minimum angle rule , the calculation of , and memorizing the rejection criteria for wire ropes and web slings . Full 200% capacity is only achieved if the

Standard daytime operations under favorable weather conditions. Definition of Critical Lifts (Excluded from Level 3)

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Ensuring all rigging activities comply with Aramco safety regulations (G.I. 7.028). 2. Essential Rigging Principles & Technical Knowledge