Tropical Hardwood Plywood Grading Rules

Tropical Hardwood Plywood Grading Rules

Grade Description BB Face CC Face Overlay Face Utility Face
Burls, Sound Yes, smooth Yes, smooth Yes, smooth Yes, smooth
Pin Knots Sound, not clustered Sound Sound Yes
Knots – Number/Arrangement/Size 4 per 4′ x 8′ panel, not clustered 6 per 4′ x 8′ panel, not clustered not clustered Yes
Sound, Live 3/4″ max dia 1″ max dia 2″ max dia Yes
Soft, Dead No well puttied & color matched well puttied & color matched Puttied
Knotholes 3/8″ max dia 1/2″ max dia, well puttied & color matched 1″ max dia, well puttied & color matched 1″ max dia, puttied
Color Variation Yes Yes Yes Yes
Stain/Mineral Streaks No Blending Yes Yes
Dry Pitch & bark pockets well puttied & color matched well puttied & color matched well puttied & color matched puttied
Wormholes, pinholes & worm tracks 5 per 4′ x 8′ panel, 1/32″ max dia, well puttied & color matched 32 per 4′ x 8′ panel, 5/8″ max dia, well puttied & color filled Well puttied Puttied
Vine Marks Blending, smooth, level Blending, smooth, level Sanded, smooth, level Sanded, smooth
Cross Breaks No Hairline, 2″ max length Hairline, 4″ max length Hairline
Doze No Firm, slight, well puttied, blending Firm, slight, well puttied, blending Firm, puttied
Joints 1 max, tight, parallel to edge, color blending at joint 1 max, tight, parallel to edge, color blending at joint 1 max, tight, parallel to edge, color blending at joint 1
Splits-Open No Hairline, 6″ max on panel ends only Hairline, 12″ max on panel ends only Hairline
Splits, Filled or Puttied Two, 1/16″ x 10″ or 1/8″ x 8″ at each end, color matched Three, 1/16″ x 24″ or 1/8″ x 14″ at each end, color matched Three at each end, color matched Yes
Fill or putty smears Color matched Color matched Color matched Yes, smooth
Rough cut/ ruptured grain No Occasional, sanded, smooth Sanded, smooth Yes
Shims 1/4″ x 6″ at ends of panel, repaired with veneer, color and grain matching 3/4″ x 6″ at ends of panel, repaired with veneer, color and grain matching Ends of panel, repaired with veneer, color and grain matching Yes
Knife marks No No 1/32″ max, smooth Sanded, smooth
Tape/Glue residue No No Slight, sanded, smooth Sanded, smooth

Sanding: Smooth, only blending or inconspicuous streaks or chatter marks permitted

Other Characteristics Not Permitted: Boat or large symmetrical patches, open bark pockets, wet pitch, grease/oil or colored chalk, mechanical defects and press marks not allowed in face grades

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