Which storage practice helps prevent lumber from falling while stacking?

• A. Stack tall and loose
• B. Cross stack, block, or tier
• C. Stack with nails
• D. Stack with no spacing

Answer: (B)

Creating a stable, interlocked pile is essential to keep lumber from falling during stacking. Cross-stacking, blocking, or tiering interlocks the layers so they resist sliding or tipping. By placing boards in alternating directions or inserting blocks at intervals, each new layer adds stability to the whole stack, making it safer to handle and less prone to collapse if bumped or moved. In contrast, stacking tall and loose produces a top-heavy, unstable stack that can tip easily; stacking with nails isn’t a practical or safe reinforcement and can damage the lumber; stacking with no spacing reduces air flow and alignment, increasing movement and the risk of shifting.