When can the crane release the panel during erection?

• A. Before braces installed
• B. Once all braces installed and panel is plumb
• C. After footings cure
• D. When wind speed is low

Answer: (B)

In tilt‑up erection, panels must be stabilized with temporary braces and accurately vertically aligned before the crane can let go. Releasing the crane is allowed only once all braces are in place and the panel is plumb, because this combination provides the necessary lateral restraint and correct vertical position so the panel won’t lean, sway, or fall once detached. Releasing before braces are installed would leave the panel unstable, and waiting for footings to cure doesn’t address the immediate stability of the panel itself. Wind speed being low isn’t the sole determinant; even in calm wind, a panel that isn’t braced and plumb can move or tip when released.