| Clear Heart |
 |
The highest grade. Includes only pieces
with heartwood on the exposed face.
Many pieces completely clear, others
have minor imperfections that do not
detract from their fine appearance.
Grading Rule Paragraph
NLGA 200a
WCLIB 102-b |
| A Clear |
 |
Permits somewhat more imperfections
than Clear Heart but the grade is still
restricted to pieces with excellent
appearance.
Common specifications are A and
Better and A and Better with a percentage
of B Grade allowed.
Grading Rule Paragraph
NLGA 200b
WCLIB 102-c |
| B Clear |
 |
Permits slightly larger and more numerous
characteristics than A grade but occassional
pieces may require trimming to yield
high grade pieces in shorter lengths.
Most often supplied as a percentage
with A grade.
Grading Rule Paragraph
NLGA 200c
WCLIB 102-d |
| C and Better Clear |
 |
High quality lumber for use where
appearance is important. In addition
to interior and exterior trim, lumber
of this grade is used for cabinetry,
doors, windows and similar applications.
Grading Rule Paragraph
NLGA 202b, c
WCLIB 149-b, c
WWPA 10.11, 12 |
| D Clear |
 |
This grade permits larger and more
numerous natural characteristics and
is used where general utility is more
important than appearance.
Grading Rule Paragraph
NLGA 202d
WCLIB 149-b, c
WWPA 10.13 |
Knotty Grades
 |
| Select Knotty |
 |
Knots are sound and tight. Other characteristics
are limited so they do not detract from
the end use intended.
Typically available commercially
as Select allowing 10%-15% Quality Knotty
in rough or surfaced products.
Grading Rule Paragraph
NLGA 204a
WCLIB 111-e
WWPA N/A |
| Quality Knotty |
 |
Natural growth characteristics not
limited as stringently as in Select
Knotty. Cross cutting may be required
on some pieces to yield tight knotted
siding.
Grading Rule Paragraph
NLGA 204b
WCLIB 111-f
WWPA N/A
|
| Proprietary |
 |
Graded to the manufacturer's specifications
to meet the intended end use. Boards
often represent good value in the no-hole
product range.
Consult manufacturers for grade
descriptions and nomenclature.
Grading Rule Paragraph
NLGA N/A
WCLIB N/A
WWPA N/A |
| Standard and Better |
 |
Suitable for exterior construction.
Occassional pieces may require trimming
to yield suitable quality for the intended
end use.
Typically supplies as S1S2E products.
S4S products may require special ordering.
Grading Rule Paragraph
NLGA N/A
WCLIB N/A
WWPA N/A
|
NLGA - National Lumber Grades Authority
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