Common cribbing block sizes include which of the following?

Common cribbing block sizes include which of the following?

• A. 2x6, 4x6, 6x8
• B. 3x3, 3x5, 5x5
• C. 1x2, 2x2, 3x3
• D. 2x4, 4x4, 6x6

Answer: (D)

Cribbing blocks are built from standard lumber sizes because that gives predictable strength and stable contact surfaces. The most common set is 2x4, 4x4, and 6x6. The 2x4 pieces act as lighter spacers to fine-tune height and fill gaps, the 4x4 blocks are the workhorse that provide solid, square contact and reliable load-bearing in the cribbing stack, and the 6x6 blocks supply the heavy, high-capacity pieces needed for larger loads or greater height. Together they cover a range of scenarios with uniform cross-sections, which helps distribute pressure evenly and prevents tilting or crushing. The other options use sizes that are not standard or mix dimensions in ways that aren’t as stable or practical for cribbing setups.

Cribbing blocks are built from standard lumber sizes because that gives predictable strength and stable contact surfaces. The most common set is 2x4, 4x4, and 6x6. The 2x4 pieces act as lighter spacers to fine-tune height and fill gaps, the 4x4 blocks are the workhorse that provide solid, square contact and reliable load-bearing in the cribbing stack, and the 6x6 blocks supply the heavy, high-capacity pieces needed for larger loads or greater height. Together they cover a range of scenarios with uniform cross-sections, which helps distribute pressure evenly and prevents tilting or crushing. The other options use sizes that are not standard or mix dimensions in ways that aren’t as stable or practical for cribbing setups.