14×520
14x520 refers to a specific size designation commonly used for certain types of manufactured goods, particularly in the context of lumber or building materials. The "14" typically denotes the width in inches, while the "520" indicates the length in feet. Therefore, a 14x520 item would be a piece measuring 14 inches in width and 520 feet in length.
This particular sizing is not standard for most common lumber dimensions, which are usually expressed in nominal