Corrugated Box Calculation: From Pallet Stacking Load to McKee BCT and Per-Unit Board Cost (Video)

This 60-second video sums up the buying guide. The full article covers the details and sources.

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Video transcript

1. 0:00Calculate your box grade instead of guessing it.
2. 0:05Start with the bottom box. It carries every box above it. In the article's example, nine 25-pound boxes put 225 pounds on top.
3. 0:16Humidity, storage, handling and pallet pattern all reduce strength. Add a safety factor, and the example needs about 613 pounds column-stacked, far more interlocked.
4. 0:27McKee's formula then estimates a board's capacity from edge crush, thickness and perimeter. In the example, 32 ECT falls short and 40 ECT clears it.
5. 0:39Finally, unfold the box. Its blank area, plus waste, gives board use per box, so you can check material cost line by line.
6. 0:50Confirm the shortlisted grade with a compression test.
7. 0:55Then send dimensions, packed weight and stack height for a quote.

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