|
|
|
Technical
Section |
(Pages 2 of 2) |
|
 |
|
|
| |
|
ABOUT HARDWOOD PLYWOOD GRADES |
|
Hardwood Lumber grades are objective
and there are no "gray" areas or overlap from the high end of one
grade to the low end of the next higher grade. |
|
Hardwood plywood grading is an
aesthetic standard and becomes subjective from one plywood grader
to another. Grading rules using terms like "blending, conspicuous,
inconspicuous, few, occasional, slight and sharp contrast" make
for "gray" areas and there is almost always some degree of overlap
in appearance between the bottom end of one grade and the top end
of the next lower grade as illustrated. |
|
The amount
of overlap in appearance increases with each successively
lower grade |
|
|
|
AA |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
A |
- |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
B |
- |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
C |
- |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
D |
- |
- |
- |
|
|
|
|
|
|
|
|
|
|
|
E |
- |
- |
|
|
Due to a wide variation of grain,
color and natural characteristics of different species, each grade
has a range of appearance from aesthetically pleasing to barely
acceptable within the same grade. The lower the grade the wider
the range of grading defects. |
|
|
|
American National Standards Institute (ANSI) has
established quality criteria for the principle types,
grades, (Face, Back and Cores) of hardwood plywood. This
grading system is intended to provide manufacturers,
distributors, architects, contractors, and other end avers
with a set of commonly understood guidelines regarding the
quality and composition the materials used in hardwood
plywood. The following pages 55-63 are the ANSI grading
rules for faces, backs and cores of hardwood plywood. |
|
Hogan
Hardwoods & Moulding requires our hardwood plywood
manufacturers to exceed ANSI rules. |
|
NOTE:
Face Grade Allowable Defects Vary By Species |
|
|
|
|
| |
|
