Final answer:
If a piece of lumber is stamped S-DRY, it means the lumber is Surface-Dry. Option 2) is the correct answer.
Step-by-step explanation:
If a piece of lumber is stamped S-DRY, it means the lumber is Surface-Dry. This means that the surface of the lumber is dried, while the core may still contain some moisture. It is important to note that S-DRY is not a measure of the lumber's moisture content, but rather an indication of the drying process.
S-DRY lumber is typically used for indoor applications such as furniture, cabinets, and flooring. It is important to allow S-DRY lumber to acclimate to the environment it will be used in before installation, as this will help prevent warping or twisting.
In summary, option 2) is the correct answer. S-DRY means the lumber is dry on the surface but may still contain moisture in the core.