|
Summary
of Characteristics and Allowable Defects for Back Grades |
|
Grade Description |
1 |
2 |
3 |
4 |
|
Sapwood |
Yes |
Yes |
Yes |
Yes |
|
Discoloration & Stain |
Yes |
Yes |
Yes |
Yes |
|
Mineral Streaks |
Yes |
Yes |
Yes |
Yes |
|
Sound
Tight Burls |
Yes |
Yes |
Yes |
Yes |
|
Sound
Tight Knots |
Max. Dia. 3/8 in. |
Max. Dia. 3/4 in. |
Max. Dia. 1-1/2 in. |
Yes |
|
Maximum Number of Tight Knots |
16 |
16 |
Unlimited to 1/2 in.; No
more than 16 form 1/2 to 1-1/2 in. |
Unlimited |
|
Knotholes |
No |
1/2 in. repaired |
1 in. |
4 in. |
|
Maximum Combined Number Knotholes and Repaired Knots |
None |
All repaired; Unlimited to
3/8 in.; No more than 8 form 3/8 in. to 1/2 in. |
Unlimited to 3/8 in.; No
more than 10 form 3/8 in. to 1in. |
Unlimited |
|
Wormholes |
Filled |
Filled |
Yes |
Yes |
|
Split
or Open Joints |
Six 1/8 in. x 12 in.
repaired |
Six 3/16 in. x 12 in.
repaired |
Yes, 3/8 in., by 1/4 length
of panel |
1 in. for one-fourth length
of panel; 1/2 in. for one-half length of panel; 1/4 in. for
full length of panel |
|
Doze &
Decay |
Firm areas of doze |
Firm areas of doze |
Firm areas of doze |
Areas of doze and decay
provided serviceability of panel is not impaired |
|
Rough
Cut/Ruptured Grain |
Two 8 in. dia. areas |
5% of panel |
Yes |
Yes |
|
Bark
Pockets |
1/8 in. wide repaired |
1/4 in. wide repaired |
Yes |
Yes |
|
Laps |
No |
Repaired |
Yes |
Yes |
|
|
|
|
We know you have
requirements for hardwood panels that must have a decorative
face and back. For these requirements, ANSI/HPVA
"back" grades will not meet your specifications and we
recommend a custom order panel with "face grades" on both
sides. Example 3/4" x 4' x 8' A-A Plain Sliced Walnut |
|
|
Repaired pin knots and pin knots
allowed. |
|
Unfilled
wormholes shall be a maximum of 1/16 inch in diameter. |
|
Available
repaired, if specified. |
|
Hogan Hardwoods
& Moulding will Customize Your Plywood Faces, Backs and Cores
to Meet Your Panel Requirements |
|
|
ANSI/HPVA HP-1-2000 |
