The weight of the load being lifted is the most critical factor in rigging and lifting.

• A. Center of gravity
• B. Load weight
• C. Dynamic load
• D. Safety factor

Answer: (B)

Weight sets the baseline for planning any lift. The lifting gear—slings, shackles, hooks, rigging hardware, and the lifting device itself—has to be rated for the load you’re moving. If you don’t know the exact weight, you can’t determine whether the equipment has enough capacity, and you can’t establish a safe working load. That makes weight the most fundamental piece of information, because everything else—how the load will be attached (center of gravity), the extra forces produced by movement (dynamic load), and the required margin (safety factor)—depends on knowing that weight. Once you have the weight, you can assess balance and stability, account for peak forces during lift, and choose an appropriate safety factor, but without the weight, those considerations can’t be correctly applied.