How do you select the number of ply for corrugated boxes?

The number of ply for corrugated boxes is selected based on the intended use, weight of the contents, and shipping conditions. Generally, single-wall boxes (3-ply) are suitable for lighter items, while double-wall (5-ply) or triple-wall (7-ply) boxes are better for heavier or fragile goods. It's also essential to consider factors such as stacking strength and environmental conditions during transport. Testing and specifications from suppliers can further help determine the appropriate ply for specific applications.