This is an interactive application for wood grading reflecting the NHLA rules. We are showing a board with defects; your goal is to add cuts to yield the necessary cutting units and achieve the desired grade. If you need some help with the interface, click here to view some tips.

You can resize and reposition each clear cut using the mouse.
To reveal the defect type and its size, hover with the mouse over it.
The "add cut" button from the "cuts" panel, adds the maximum-area clear cut available to the board.
The "snap to min. cut size" toggle (from the "Cuts" panel) allows you to easily fit cuts that have exactly the minimum cut size along a dimension.
If "show unsound defects from the reverse side" is selected and you are on the poor face of the board, the "load" button will show the cuts after re-grading on the propagated defects.

Board

show first lineal regions

show unsound defects from the reverse side

expected grade:
predicted grade: ◇ predicted poor face:
board size:
measured width:
surface measure (SM):

Grade

min. board size:
min. cut size:
required cutting units:

defect limits:

defect	description	value	limit	valid

Note: All values from the table are in inches.

first lineal rule:

clear sound unsound valid

Note: Percentage of clear wood and sound and unsound defects for each of the two first lineal regions. A region is valid if the clear wood is at least 50% and unsound defects are limited to 25% of the area.

Cuts

snap to min. cut size

id	rect.	width (in)	length (ft)	cut units	delete

total cutting units: 0

elapsed time:

NHLA Grading Tool

Board

Grade

Cuts