If the gap between the column compression joint and base plate exceeds 1/16 inch but is less than 1/4 inch, what material should be used to pack it out?

When the gap between the column compression joint and the base plate exceeds 1/16 inch but is less than 1/4 inch, the use of non-tapered steel shims is appropriate. This choice is based on the need for stability and load distribution in structural connections. Non-tapered steel shims provide a uniform thickness that ensures consistent contact with both surfaces, which enhances the integrity of the connection.

Moreover, steel shims are strong and durable, capable of bearing significant loads without compressing or deforming over time. This is essential in structural applications where the load conditions are variable and must be reliably supported.

The other materials are not optimal for this scenario. Tapered steel shims can create uneven support and possibly lead to issues with alignment or load transfer. Wood shims, while sometimes used in less critical applications, may not provide the necessary strength and durability in structural settings. Plastic shims, although lightweight, may lack the structural integrity required in load-bearing situations and can deform under pressure. Therefore, the choice of non-tapered steel shims strikes the right balance of strength, load support, and uniformity for the specified gap range.