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Shakes - Grading Rules |
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Shakes
18" Tapersawn Shakes 24" Tapersawn Shakes Hand-split & Resawn Shakes
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18 INCH
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No.1 Grade
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No. 2 Grade
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No. 3 Grade
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WOOD
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Clear Area – Above the butt
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All
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9”
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n/a
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Sapwood
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1/8”
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1”
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Yes
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FLAT GRAIN
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No.1 Grade
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20%
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Yes
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Yes
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Premium Grade
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100% VG
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n/a
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n/a
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Standard Grade
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Yes
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n/a
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n/a
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Checks & Feathers
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Down to 17”
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Defect sizes
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None
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1 ½”
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-
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Total Defects
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None
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½ width
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-
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LENGTH
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Maximum
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20”
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None
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None
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Minimum
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17”
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16”
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15”
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WIDTH
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Maximum
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None
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None
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None
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Minimum
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4”
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4”
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4”
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Undersize %
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5%
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10%
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-
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Min Undersize
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3 ½”
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3”
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3”
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Off parallel/square
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5/8”
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5/8”
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5/8”
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THICKNESS
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¾” Shakes
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¾”
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¾”
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½”
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Undersize %
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10%
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10%
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-
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Undersize min.
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11/16”
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11/16”
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-
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5/8” Shakes
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5/8”
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5/8”
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½”
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Undersize %
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10%
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10%
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-
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Undersize min.
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9/16”
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9/16”
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-
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COVERAGE
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5 bundles per square
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Min. 357 lineal inches on grade per bundle
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PACK
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18” wide frame
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12/12 pack, 5 bdl sq.
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24 INCH
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No.1 Grade
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No. 2 Grade
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No. 3 Grade
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WOOD
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Clear Area – Above the butt
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All
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12”
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n/a
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Sapwood
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1/8”
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1”
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Yes
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FLAT GRAIN
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No.1 Grade
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20%
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Yes
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Yes
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Premium Grade
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-
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-
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-
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Standard Grade
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Yes
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-
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-
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Checks & Feathers
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Down to 22”
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Defect sizes
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None
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1 ½”
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-
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Total Defects
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None
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½ width
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-
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LENGTH
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Maximum
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27”
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None
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None
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Minimum
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22”
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22”
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22”
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WIDTH
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Maximum
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None
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None
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None
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Minimum
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4”
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4”
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4”
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Undersize %
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5%
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10%
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-
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Min Undersize
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3 ½”
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3”
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3”
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Off parallel/square
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5/8”
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5/8”
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5/8”
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THICKNESS
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¾” Shakes
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¾”
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¾”
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½”
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Undersize %
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10%
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10%
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-
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Undersize min.
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11/16”
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11/16”
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-
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5/8” Shakes
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5/8”
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5/8”
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½”
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Undersize %
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10%
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10%
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-
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Undersize min.
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9/16”
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9/16”
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-
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COVERAGE
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5 bundles per square
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Min. 268 lineal inches on grade per bundle
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PACK
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18” wide frame
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9/9 pack, 5 bdl sq.
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HAND-SPLIT & RESAWN SHAKES
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24 INCH
#1 Grade
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18 INCH
#1 Grade
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WOOD
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Clear Area – Above the butt
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All
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All
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Sapwood
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1/8”
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1/8”
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FLAT GRAIN
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No.1 Grade
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20%
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20%
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Premium Grade
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-
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-
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Standard Grade
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Yes
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Yes
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Checks & Feathers
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Down to 22”
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Down to 17”
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LENGTH
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Maximum
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27”
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20”
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Minimum
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22”
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17”
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WIDTH
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Maximum
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None
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None
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Std. Grade Max
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8”
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8”
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Minimum
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4”
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4”
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Undersize %
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5%
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10%
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Off parallel/square
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1”
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1”
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THICKNESS
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¾” Heavies - min
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¾”
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¾”
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Exposure Line
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10”
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7 ½”
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Exposure Line Min
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3/8”
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3/8”
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½” Mediums - min
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½”
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½”
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Exposure Line
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10”
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7 ½”
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Exposure Line Min
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¼”
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¼”
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COVERAGE
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5 bundles per square
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Min. 268 lin. In. on grade per bdl
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Min. 357 lin. In. on grade per bdl
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PACK
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18” wide frame
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9/9 pack, 5 bdl sq.
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12/12 pack, 5 bdl sq.
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