What factors can cause the panel's center of mass to differ from the panel's geometric center?

• A. Wind direction
• B. Panel weight uniform
• C. Openings and block outs.
• D. Panel color

Answer: (C)

Mass distribution inside the panel determines its center of mass. When there are openings or block outs, material is removed from specific areas, so the remaining mass is not evenly spread around the geometric center. That nonuniform distribution moves the center of mass toward the heavier parts of the panel, away from its geometric center. In tilt-up work, this shift matters for how the panel is rigged and lifted, since the balance point isn’t where the panel visually appears to be.

Wind direction doesn’t change the panel’s own mass distribution, it changes the loads acting on the panel during the lift. Panel color is purely cosmetic and has no effect on where the mass is concentrated. If the panel were perfectly uniform with no openings, its center of mass would align with the geometric center; openings or block outs create the difference.