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Tip
#127
Understanding Lumber Grades
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What
Is The Meaning Of All Those Grading Letters And Numbers On
Wood?
Here you go:
GRADES
FOR HARDWOOD LUMBER
FIRSTS: The best wood available for fine furniture
and cabinet work. 8' to 16' long First grade boards must be
6 " or more in width and be 91-2/3 percent or more clear and
free of defects on BOTH SIDES.
SECONDS:
Very good choice for the large majority of furniture and cabinet
work. 8' to 16' long Second grade boards must be 6" or more
in width and be 83-1/3 percent or more clear and free of defects
on BOTH SIDES.
SELECTS: Select lumber is a good choice for the majority
of cabinet-making applications. Boards must be 6' to 16' long,
4" or more in width It must be 91-2/3 percent or more clear
and free of defects on ONE SIDE ONLY and therefore, some waste
can be expected.
NO.
1 COMMON: A good choice for less-critical cabinet-making
and similar interior applications, No. 1 common lumber must
be 4' to 16' long, 3" or more in width and only 66-2/3 percent
or more clear and free of defects on ONE SIDE ONLY. Some waste
is to be expected.
NO.
2 COMMON: Acceptable for flooring, paneling and similar
less-critical projects such as those that will be filled and
painted. No. 2 common lumber must be 4' to 16' long, 3" or
more in width and need be only 50 percent or more clear and
free of defects on ONE SIDE ONLY. Significant waste is to
be expected.
NO.
3-A COMMON: Acceptable for less-critical projects. No.
3-A common lumber must be 4' to 16' long, 3" or more in width
and need be only 33-1/3 percent or more clear and free of
defects on ONE SIDE ONLY. More waste than usable stock is
to be expected.
NO.
3-B COMMON: Acceptable for few projects. No. 3-B common
lumber must be 4' to 16' long, 3" or more in width and need
be only 25 percent or more clear and free of defects on ONE
SIDE ONLY. More waste than usable stock is to be expected.
continue
to GRADES FOR SOFTWOOD LUMBER
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