Design Multiplier
Packaging engineering formulas incorporate empirical reduction coefficients to calculate the required laboratory compression values for corrugated shipping containers. Designated as the stacking safety factor, this dimensionless multiplier scales container strength against distribution hazards. The calculation divides individual box compressive resistance by the static load of upper pallet layers.
Application of the multiplier ceases when structural column tilting or wall puncture occurs.
Degradation Component
Environmental humidity and cyclic moisture exposure drive the largest individual reductions in corrugated compressive endurance. Calculations of the stacking safety factor assign specific multipliers for sustained relative humidity above eighty percent, pallet pattern misalignment and transit vibration. Interlocking pallet patterns cut vertical compressive resistance by up to fifty percent relative to columnar alignment.
Corrugated fluting experiences progressive microbuckling under prolonged static loads, causing failure at stress levels far below initial laboratory crush ratings.
Warehousing Limit
Distribution specifications for industrial supply chains demand safety multipliers typically ranging from three point zero to five point zero. Export produce cartons subject to cold storage and high humidity routinely require a stacking safety factor exceeding four point five to prevent warehouse stack collapse. Dry retail packaged goods shipped on columnar pallets through rapid turnover channels function reliably with values near three point zero.
Specifying excessive multipliers drives unnecessary fibre usage and increases basis weights without delivering proportional damage protection. Insufficient values yield carton bulging and catastrophic pallet collapse during maritime transit.