When preparing for a lift, determining the center of gravity (COG) is just as important as knowing the load’s weight. The COG is the point at which the load’s weight is evenly distributed, and if it's not positioned directly beneath the hook, the load will become unstable, creating a dangerous situation. A misaligned COG will cause the load to shift until it settles directly below the suspension point, which can lead to accidents or damage.

According to Ralf Notheis, Manager of Bigfoot Academy, there are at least five different ways to find the COG and only one requires an on-site calculation. “Sometimes loads come with engineered lugs already in place based on the COG,” says Notheis. “Other times the COG is supplied to the rigger, either marked on the load itself or in the paperwork.”

Methods for Finding the Centre of Gravity

In Bigfoot's Civil Rigging Course, riggers learn the two most common methods for determining the COG: estimating and calculating.

• Estimating the COG involves test lifts, where riggers adjust rigging lengths as needed to achieve balance.
• Calculating the COG requires basic tools like a tape measure and a calculator to determine the precise point where the load will be balanced.

Riggers also receive specialized training for dealing with narrow loads and uniquely shaped items, which often present additional challenges in maintaining load control. Understanding these principles is essential for ensuring that loads remain stable throughout the lift.

The Importance of COG in Civil Rigging

Unstable loads are one of the leading causes of accidents and injuries in rigging operations. Proper training on how to determine the COG not only prevents accidents but also allows riggers to lift loads efficiently and safely. At Bigfoot Academy, our goal is to equip every rigger with the skills and knowledge necessary to avoid instability and execute safe lifts.

Want to learn more about balancing loads and ensuring safe lifts? Enroll in our Civil Rigging Course today and gain the expertise to master load control and safety. Click the button below to get started!