What is the primary reason water is removed from the panel perimeter and openings prior to lifting tilt-up panels?

• A. To prevent suction that would occur when the crane initially lifts the panel off the surface.
• B. To improve bond with the surface.
• C. To reduce the panel weight slightly.
• D. To speed up the curing process.

Answer: (A)

Water around the panel edges creates suction as the crane begins to lift the panel off the surface. This suction comes from air being unable to rush in beneath the panel, generating a negative pressure that resists separation and can cause the panel to stick to the surface or jerk during the lift. Removing the water allows air to flow under and around the openings as the lift starts, equalizing pressure and enabling a smooth, controlled release from the surface. It isn’t about improving bond, reducing weight meaningfully, or speeding curing—the primary concern is preventing suction that would complicate the initial lift and endanger the operation.