Why is the rigging aligned to the panel's center of mass rather than the panel's geometric center?

• A. Because it's easier
• B. Because the lifting geometry is simple
• C. Because the panel center is always correct
• D. Because openings and block outs shift weight so the center of mass may not align with the panel's geometric center

Answer: (D)

Rigging through the panel’s center of mass is essential because the weight distribution determines where the lifting force should act to keep the panel balanced. Openings and blockouts remove material, shifting the actual mass to a location that's not the panel’s visual center. If you lift from the geometric center, the force doesn’t line up with where the weight really sits, creating a moment that can cause the panel to rotate or tilt unpredictably during lift. Aligning the rigging with the center of mass keeps the lift balanced, reduces unwanted rotation, and leads to a smoother, safer placement.