What is the maximum number of boxes that can be stacked over thermite welding kits?

The maximum number of boxes that can be stacked over thermite welding kits is four. This limitation is primarily due to safety and operational considerations. Thermite welding kits contain materials that are sensitive to conditions such as pressure and impact. Stacking too many boxes can create an unstable environment, which could lead to accidents or spills, particularly since the kits typically contain reactants that are used in high-temperature applications.

Furthermore, the design and packaging of these kits follow specific guidelines to ensure safe handling and storage. The limit of four boxes allows sufficient space for ventilation and minimizes the risk of exceeding weight capacity, which could compromise the integrity of the boxes or the stability of the stack. Therefore, adhering to this stacking limit is vital for ensuring safety during the storage and handling of thermite welding kits.