What is the tolerance on lifting insert locations?

• A. +/- 2 inches
• B. +/- 1 inch
• C. +/- 0.5 inch
• D. +/- 3 inches

Answer: (B)

The lift inserts must be located within a tight, practical range to ensure the crane loads pass through the intended path and the panel lifts cleanly without twisting or binding. The standard tolerance is plus or minus one inch. This allowance accounts for minor variations in formwork, placement of hardware, and concrete placement, while keeping the lift point close enough to the planned center of gravity to avoid eccentric loading that could cause uneven lifting or panel rotation. If a measured location falls outside this range, the lift plan should be reviewed with engineering and corrective action taken.