What type of grout is required between a column base plate and the foundation according to the AISC Steel Construction Manual?

The requirement for high-strength non-shrink grout between a column base plate and the foundation, as outlined in the AISC Steel Construction Manual, is rooted in the need for a reliable and durable connection that can withstand various loads and environmental conditions. High-strength non-shrink grout is specifically formulated to maintain its volume after curing, ensuring that it fills any voids completely and provides a solid bearing surface under the base plate. This characteristic is crucial for transferring loads effectively from the structure into the foundation, minimizing the risk of settlement or movement over time.

In contrast, options such as standard cement grout may not provide the necessary strength and volume stability required for structural support. Epoxy grout, while offering excellent adhesion and performance in certain applications, may not always be necessary or suitable for every situation involving column bases. Regular shrink grout, as the name implies, does not maintain its volume post curing, which could lead to gaps between the base plate and the foundation, compromising the structural integrity.

In summary, high-strength non-shrink grout is the ideal choice for creating a robust and dependable interface between the column base plate and the foundation, ensuring longevity and structural stability.