What kind of shimming technique is recommended to maintain stack integrity?

Using the thickest shims on the bottom is the recommended technique for maintaining stack integrity. This approach provides a stable foundation for the stack of components, ensuring that the load is distributed evenly across the base. By placing thicker shims at the bottom, structural integrity is enhanced, which helps prevent any potential shifting or settling that could occur if thinner shims were used in the lower positions.

Maintaining stability at the bottom is crucial because it supports the entire assembly. If thinner shims were placed there, they may not provide adequate support, potentially leading to misalignment or failure of the machinery over time. Thus, using thick shims in a stacked assembly allows for proper leveling and alignment of components, essential for optimal operation in millwright applications.