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PLAIN SAWN: flooring that is marked or specified as PLAIN SAWN or
PLAIN, may contain any combination of the following types of grain
classification. Also, flooring without a grain designation may contain any
combination of the types of grain classification: Plain Sawn, Rift Sawn, and
Quarter Sawn.
QUARTER
SAWN: flooring that is marked or specified as QUARTER SAWN or QUARTERED;
at least 50% of the piece must contain Quartered characteristics.
Quartered
characteristics as defined by NOFMA are: In cross section the angle of the
annual ring tangent to the face of the piece to be between 45° and 90°.
Grain lines to be mostly parallel to the length of strips, and medullary ray
flecks present and more than 1/16" wide.
RIFT SAWN:
Flooring that is marked or specified as RIFT SAWN or RIFT; at least 75% of
the piece must contain Rift characteristics.
Rift
characteristics as defined by NOFMA are: In cross section the angle of the
annual ring tangent to the face of the piece to be between 30° to 60°. Grain
lines to be mostly parallel to the length of strips and medullary ray flecks
less than 1/16" wide.
QUARTER/RIFT
SAWN: Flooring that is marked or specified as NOFMA QUARTER/RIFT SAWN or
QUARTER/RIFT, is a combination of QUARTER SAWN and RIFT SAWN developing from
the production run.
OAK FLOORING GRADING RULES
(NOTE: Characters included in a higher grade are automatically
accepted in lower grades.)
NOFMA CLEAR OAK
A flooring product of mostly heartwood with a minimum number of character
marks and discoloration, providing a uniform appearance while allowing for
all heartwood natural color variations.
Will admit the
following: 3/8" bright sapwood entire length of strip or equivalent if not
extending further than 1" for 1/3 length of piece; small burls and fine pin
worm holes; and equivalent characters such as small tight checks; in the
absence of these, one thin brown streak 3" long to be allowed every 6'.
Standard
Packaging - Bundles to be 1 1/4' and longer; Average length, bundled or
nested, 3 3/4'. Shorter Packaging - Average length for 7' and shorter
packages, nested or otherwise, 3 1/2'.
NOFMA SELECT OAK
A flooring product with coloration variations produced by differences of
natural heartwood and sapwood, along with characters described.
The face may
contain: unlimited sound sapwood; slight imperfections in milling; a small
tight knot every 3'; pin worm holes; burls and a reasonable amount of
slightly open checks. Brown streaks should not extend the entire length of a
piece. Two flag worm holes to every 8' are permitted. Slight imperfections
in face work (torn grain) admitted. An intermittent, brown machine burn
across the face not exceeding 1/4" width admitted. Also, a slight quantity
of bark on the back or sides admitted. Will admit pieces with 1/2 tongue.
Spot filling is generally required for open characters.
Standard
Packaging - Bundles to be 1 1/4' and longer; Average length, bundled or
nested, 3 1/4'. Shorter Packaging - Average length for 7' and shorter
packages, nested or otherwise, 3'.
NOFMA NO. 1 COMMON OAK
A flooring product which contains prominent variations in coloration and
varying characters.
The following
are not admitted: broken knots over 1/2" in diameter, large grub worm holes;
and splits extending through the piece. Open characters such as checks and
knot holes are admitted, buit must be sound and readily fill. Not more than
20" scant stock in thickness allowed to every 5'. Minor imperfections in
machining permitted. Shall admit sticker stain; varying wood
characteristics, such as flag worm holes, heavy streaks, checks, and worm
holes; and an occasional dark machine burn across the face not exceeding
1/2" wide, 1/64" deep and not more than two each 3'. 1/4 tongue allowed.
Extremely dark pieces are not to be included.
Standard
Packaging - Bundles to be 1 1/4' and longer; Average length, bundled or
nested, 2 3/4'. Shorter Packaging - Average length for 7' and shorter
packages, nested or otherwise, 2 1/2'.
NOFMA NO. 2 COMMON OAK
May contain sound natural variations of the forest product and manufacturing
imperfections. The purpose of this grade is to furnish a floor suitable for
homes, general utility use, or where character marks and contrasting
appearance is desired.
The following
are not admitted: shattered or rotten ends, large broken knots, excessive
bad millwork, shake, advanced rot, and similar unsound defects. Dark machine
burns exceeding 3/64" deep not admitted. Knot holes and open characters
which will readily fill are admitted. A limited number of pieces with no
tongue which may be face nailed are admitted.
Standard
Packaging - Bundles to be 1 1/4' and longer; Average length, bundled or
nested, 2 1/4'. Shorter Packaging - Average length for 7' and shorter
packages, nested or otherwise, 2'.
NOFMA 1 1/4' SHORTS OAK
Pieces 9" to 18" long are to be bundled together and designated as 1 1/4'
Shorts. Pieces graded NO. 1 COMMON, SELECT and CLEAR to be bundled together
and designated NO. 1 COMMON & BETTER with pieces grading NO. 2 COMMON
bundled separately and designated as such. Although pieces 6" under and only
3" over the nominal length of the bundle may be included, the pieces must
average 1 1/4', which is achieved through the natural preponderance of
longer lengths.
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