How can first and second (FAS) lumber be best described?

First and second (FAS) lumber is specifically graded to indicate high quality, which means it is characterized by the presence of very few knots and irregularities. This grading ensures that the lumber has a clean, smooth appearance and is suitable for applications where aesthetics and structural integrity are important.

High-quality lumber, such as FAS, is often used in fine furniture and cabinetry due to its minimal defects, allowing for easier machining and a polished finish. This grading typically requires a board to be at least 83% clear of defects when cut from standard sizes.

The remaining choices are either specific to different types of lumber or do not accurately reflect the characteristics of FAS. For instance, boards suitable for concrete forms would prioritize strength and durability over aesthetic qualities, while exceptionally green lumber refers to freshly cut wood that still contains high moisture content, which does not align with the quality standards of FAS. Additionally, while FAS lumber can come in various lengths, this is not a defining characteristic of the grade itself.