Tree Grades

Tree Grading and Scaling Specifications

HARDWOODS

Grade

Minimum DBH

Minimum HT/DOB

Quality Requirements

1*

18"

16'/10"

4 clear faces

2*

16"

16'/10"

3 clear faces

3*

14"

16'/10"

2 clear faces

4*

12"

16'/10"

1 clear face

5

10"

8'/10"

sound

6

8"

8'/6"

sound

SOFTWOODS

White Pine 

Grade

Minimum DBH

Minimum HT/DOB

Quality Requirements

1*

18"

24'/10"

knots <1" D

2*

16"

24'/10"

knots <2" D

3*

14"

16'/10"

knots <3" D

4*

12"

16'/10"

knots <4" D

 
 Hemlock

Grade

Minimum DBH

Minimum HT/DOB

Quality Requirements

1

18"

48'/10"

sound, FC 75

2

16"

32'/10"

sound, FC 75

3

14"

16'/10"

sound, FC 75

4

12"

16'/10"

sound, FC 65


Red Pine

Grade

Minimum DBH

Minimum HT/DOB

Quality Requirements

1

14"

48'/8"

straight, knots <2" D

2

12"

32'/8"

straight, knots <2" D

3

10"

16'/8"

straight, knots <2" D

4

10"

16'/8"

sound

* Hardwood grades are based on the best 12' of the first 16' in the tree.  Pine grades are based on the first 24' in  the tree.  Black-knotted pines are reduced one grade.  DOB means diameter outside bark.

NOTE: White pine and hemlock grades 5 and 6 have same specifications as hardwoods.  Red pine grades 5 and 6 have the same specifications as hardwoods less 2" DOB.