NOTE:

• For side glue: it supports up to 5 layers (e.g., BE, EE, etc.).
• For lock bottom boxes: it supports only up to 3 layers (e.g., B, C, etc.) because, in 5-layer structures, some corners may have 5×5 overlapping layers, which makes the corrugated board prone to bursting.
• For 4-corner boxes: some designs allow 5 layers, depending on the box’s design, size, and shape.

Note: The maximum technical values shown cannot be applied simultaneously.