To know how much load a box can hold, use this formula: stacking strength = BCT/safety factor. Stay within this limit to protect your items during transport or storage.
Stacking Strength = BCT/Safety Factor

Influencing factors:

There are several factors that can have an impact on the quality of a product. One of the most significant is the interaction between the product and its packaging. Other factors that can influence product quality include the level of humidity in the environment, the amount of time that has elapsed since the product was packaged, stacking misalignment during storage, pallet overhang, and the conditions of transportation. To ensure accurate assessment of these factors, safety factors and retention analysis are commonly used. By accounting for these factors, it is possible to maintain the integrity of the product throughout its entire lifecycle.

Depends on:
• Level of assurance
• Type of package
• Mode of transportation
• Static warehouse
• Dynamic vehicle

Assurance Levels:

• The levels are determined based on
• The product value,
• The desired level of anticipated damage that can be tolerated,
• The number of units shipped,
• The knowledge of the shipping environment, or
• other criteria

ASTM Assurance Levels:

• Level 1 – Low probability, High intensity events (more severe than Level 2)
• Level 2 – (Commonly used)
• Level 3 – High probability, low intensity events (less severe than level 2)

Example 1

Let's say you conduct a compression test on a corrugated box package without any rigid internal supports under standard conditions in the lab, and obtain a compression strength value of 800 lbs. If your client requires Assurance Level II, you can use the Fixed Safety Factor method to determine the Safe Stacking Strength of the package.

What is the maximum weight that a package can safely withstand without collapsing when stacked in a warehouse?

When performing compression tests for a corrugated box without any rigid internal supports, obtaining a compression strength of 800 lbs under standard conditions is a strong indicator of its durability. In order to ensure the safety of the package during transportation, it is recommended to utilize the Fixed Safety Factor method to determine the Safe Stacking Height. Considering the client's request for Assurance Level II, we can confidently calculate the appropriate Safe Stacking Height for the package.

The method used to determine the safe stacking height of materials is the Fixed Safety Factor Method.
• BCT= 800 lbs.
• Safe Stacking Strength = 800/4.5=177.78lb