What does the grade of a fiberboard box measure?

The grade of a fiberboard box is primarily an indication of its strength and durability. Fiberboard, often referred to as corrugated cardboard, is graded based on its ability to withstand various stresses, including compression, impact, and environmental factors. The grading system takes into account the materials used, including the type and thickness of the liners and the flute type, which together determine how well the box can protect its contents during shipping and storage.

Understanding the strength and durability of a box is essential for ensuring that it can support the weight of the items inside and withstand conditions it may encounter during transit. A higher grade typically correlates with a stronger, more durable box that can handle heavier loads and offer better protection against damage. This grading is crucial for manufacturers and retailers to select the appropriate packaging based on the specific requirements of the products being shipped.