Safe Rigging Series by Petrolift - Episode 1

Episode 1: The Fundamentals of Rigging – Key Definitions, Planning & Responsibilities

Step 1: Key Terms You Must Understand:

To operate rigging equipment safely, it’s critical to understand these terms.

Term	Definition
WLL	Working Load Limit: The maximum safe load a device can handle during lifting.
Breaking Strength	The actual point at which the device fails or breaks.
Design Factor	Safety margin built into the equipment (typically 5:1 or 4:1).
Proof Load	A test load applied to verify the integrity of the equipment.

Important: Never exceed the WLL — the design factor is for engineering, not for use.

Step 2: The 20 Questions to Ask Before Every Lift:

Before lifting, your team must review a proper lift plan. Ask:

What is the actual weight of the load?
What is the center of gravity of the load?
Have the correct rigging devices been selected?
Have all rigging components been inspected prior to use?
Are the Working Load Limits (WLL) adequate for all components?
Is the correct lifting method being used (vertical, choker, basket, etc.)?
Will angles or sling twists affect the rated capacity?
Has the lifting device (hoist/crane) been checked and is it in good condition?
Is the load properly secured and balanced?
Is the ground or landing area stable and safe?
Is the work area free of obstacles?
Is the path of the load clear and hazard-free?
Has everyone involved been properly trained for the lift?
Is there a designated lift supervisor present?
Is there an emergency plan in case something goes wrong?
Have weather conditions (wind, rain, visibility) been checked?
Are taglines or hand signals being used appropriately?
Will the load be lifted over people or valuable property?
Are all rigging components properly tagged and readable?
Has the lift plan been documented, reviewed, and approved?

Golden Rule: Safe lifting = Good planning + Careful execution + Healthy equipment

Step 3: Who’s Responsible?

Role	Responsibilities
User (Operator/Rigger)	Pre-use inspection- Proper application- Avoid damaged or mislabeled gear.
Manufacturer	Compliant design- Clear markings & specs- Instructions for use and care

In the next episode of Petrolift’s Safe Rigging Series, we’ll cover: Inspection essentials – how to check your gear before and after every lift.