Certified Logistics Technician (CLT) Practice Exam

Cantilever racks are specifically designed for the storage of long and heavy items such as lumber, pipes, or metal sheets. This type of rack features arms that extend from a vertical structure with no front supports, allowing for easier loading and unloading of large and bulky materials. The open design provides ample space and accessibility, accommodating various lengths of lumber without the constraints that other racks might impose.

In contrast, pallet racks, selective racks, and drive-in racks are structured for more standardized shelving and are typically used for smaller, more uniform products. Pallet racks are ideal for palletized goods and allow for forklift access, while selective racks provide easy access to individual items but may not support long items effectively. Drive-in racks are designed for high-density storage but are best suited for products that can be stored in a "last in, first out" manner, which does not lend itself well to the handling of large lumber pieces.

Overall, the cantilever rack is the most appropriate choice for storing large pieces of lumber due to its design and functionality, allowing for efficient and safe storage.