Shimpaks are typically available in which sizes? (Alternate phrasing)

• A. 4x6
• B. 4x4
• C. Both 4x6 and 4x4
• D. 4x8

Answer: (C)

In tilt-up work, you use shim packs to fine-tune the height and alignment of panels and formwork. Because different joints and gaps show up in different jobs, shim packs are kept in a couple of common sizes so you can match the support surface to the space you’re dealing with. The two sizes most often stocked are 4x6 and 4x4, which cover the majority of typical gaps and provide enough surface area for stable lifting and adjustment. A larger size like 4x8 isn’t as routinely needed, so the standard availability includes both 4x6 and 4x4.