1. What Is Stacking Strength?

Stacking Strength represents the maximum load a corrugated box can withstand when stacked in a warehouse or during transportation. It is calculated by dividing the Box Compression Test (BCT) value by an appropriate safety factor.

2. How Does the Calculator Work?

The calculator uses the stacking strength formula:

Where:

• \( \text{BCT} \) — Box Compression Test value (lb or kgf)
• \( \text{Safety Factor} \) — Safety factor (typically 5-8, unitless)

Explanation: The safety factor accounts for variables like dynamic loads, humidity, and storage duration that can affect box performance in real-world conditions.

3. Importance of Stacking Strength Calculation

Details: Accurate stacking strength calculation is crucial for determining safe stacking heights in warehouses, preventing box collapse during storage and transportation, and optimizing packaging design.

4. Using the Calculator

Tips: Enter BCT value in pounds or kilograms-force, and safety factor (typically between 5-8). All values must be valid (BCT > 0, safety factor ≥ 1).

5. Frequently Asked Questions (FAQ)

Q1: What is BCT?
A: BCT (Box Compression Test) measures the maximum compressive force a box can withstand before buckling or collapsing.

Q2: Why use a safety factor?
A: Safety factors account for real-world variables like humidity, dynamic loads, and long-term storage that laboratory tests may not fully replicate.

Q3: What is a typical safety factor range?
A: For corrugated boxes, safety factors typically range from 5 to 8, depending on storage conditions and risk tolerance.

Q4: How does humidity affect stacking strength?
A: High humidity can reduce corrugated board strength by up to 50%, which is why appropriate safety factors are crucial.

Q5: Can this calculator be used for all box types?
A: This calculation is primarily for regular slotted containers (RSC). Special designs may require additional considerations.