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flooring that is marked or specified as PLAIN SAWN or PLAIN, may contain
any combination of the following types of grain classification: Plain
Sawn, Rift Sawn, and 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.
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.
Flooring that is marked or specified as QUARTER/RIFT SAWN or QUARTER/RIFT,
is a combination of QUARTER SAWN and RIFT SAWN developing from the production
T&G (TONGUE AND GROOVE):
Flooring that is marked or specified as T&G means that the flooring
is held together by a style called "tongue and groove". T&G
is accomplished by creating a joint made by fitting a tongue on the
edge of a board into a matching groove on another board.
OAK FLOORING GRADING RULES
(NOTE: Characters included in a higher grade are automatically accepted
in lower grades.)
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'.
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'.
COTTAGE GRADE OAK
Cottage grade oak is a rustic grade that admits knots and the natural
varitations of the lumber. It has unique colors, grain patterns, and
growth characteristics that offer a rich and exceptional appearance.
Cottage grade is more selective than a numbered common, having varitaitons
in grade while maintaining an overall quality board.
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'.
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'.
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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