R.I. Gen. Laws § 2-20-14: Measurement of mahogany and cedar.

(a) In the survey and measurement of mahogany and cedar timber, there shall be allowed:

(1) If the timber is sound and free from wane, two (2) inches on one side of the square, one inch on the other side and two (2) inches in length;

(2) If the timber is wider on one side than on the other, the two (2) inches shall be taken from the narrow side;

(3) If wany, two (2) inches on each side of the square;

(4) For rot and shakes, there shall be an allowance made as the surveyor deems expedient, not exceeding one-half.

(b) All timber that is wormeaten, very much rotten, badly shaked or very wany, shall be denominated refuse, and allowance shall be made for rot.