In tilt-up panel erection planning, where should erection begin, and which panel should be introduced first by height?

• A. In a corner and the tallest panel first
• B. From the center and smallest panel first
• C. From the exterior edge and shortest panel first
• D. From the interior corner and tallest panel last

Answer: (A)

Starting with a stable reference frame is essential in tilt-up erection. Beginning in a corner gives you two walls that brace each other at a defined intersection, which helps you line up and plumb subsequent panels more accurately. Erecting the tallest panel first establishes a strong vertical reference and provides a robust anchor for temporary bracing as more panels are lifted, making it easier to control alignment and keep the structure stable as the height grows. This approach also tends to balance loads early and simplifies crane positioning and rigging for the remaining lifts. Starting from a center or exterior edge, or lifting a smaller panel first, would make it harder to establish stable alignment and bracing, and lifting the tallest panel last deprives you of an early vertical reference, increasing the challenge of subsequent lifts.