R.I. Gen. Laws § 2-20-18: Grading of other hard woods.

In the survey of ash, maple and other hardwood boards, planks, joists and timber, there are two (2) sorts: The first sort is denominated merchantable and shall include all boards, planks, joists and timber that are sound and free from bad knots and free from shakes and rot; the second sort is denominated refuse, and shall include all other descriptions, with allowance for rot.