Introduction | Measurement
| FAS
& FAS One Face (Selects)
No.1
Common & No.2A Common | Additional
Guidance | Summary
Introduction
The purpose of this guide is to provide a simplified but thorough
explanation of the grading rules for American hardwood lumber. They
were established over 100 years ago by the newly formed National
Hardwood Lumber Association (NHLA). Today the NHLA has over 2000
members worldwide, and the NHLA rules are still the national standard
for the US hardwood industry and form the basis for grading of export
lumber.
Wood is a natural material and by its very nature may contain different
characteristics and defects that need to be understood and allowed
for in any given application. The grading of sawn wood into categories
as it is processed helps to determine to a large extent the value
and potential use possible or each board of sawn lumber.
The NHLA grading rules provide both the buyer and seller with a
consistent language to use in specifying hardwood lumber transactions.
Although the NHLA grading rules are targeted for the US marketplace,
a reasonable knowledge is essential for buyers worldwide in order
to attain their expected degree of quality. The grade of lumber
purchased by a manufacturer will determine both the cost and waste
factor that is achieved. Because the grades are based on the percentage
of clear wood in the board, many of the beautiful, natural characteristics
found in hardwoods are not considered in calculating the clear yield.
Hardwood lumber is usually graded on the basis of the size and
number of cuttings (pieces) that can be obtained from a board when
it is cut up and used in the manufacture of a hardwood product.
The NHLA rules were designed with the furniture trade in mind to
provide a measurable percentage of clear, defect-free wood for each
grade. The upper grades provide the user with long clear pieces,
while the Common grades are designed to be re-sawn into shorter
clear pieces.
The upper grades, which will include FAS, FAS-One-Face (FAS/1F)
and Selects, are most suitable for long clear mouldings, joinery
products such as door frames, architectural interiors; and furniture
applications, which require a heavy percentage of long wide cuttings.
The Common grades, primarily Number 1 Common (No. 1C) and Number
2A Common (No. 2AC), are likely to be most suitable for the kitchen
cabinet industry, most furniture parts, and plank and strip flooring.
Worth noting is the fact that once re-sawn, the cuttings obtained
from the Common grades will be the same clear wood as the upper
grades but in smaller (shorter and/or narrower) cuttings. The grade
name simply designates the percentage of clear wood in the board,
not the overall appearance.
The American hardwood temperate forest resource is the largest
of its kind anywhere in the world, with a significant history of
sustainability. Exploring the Common grades, where possible, is
invaluable in achieving the most value both in lumber cost and yield.
These efforts will also help to ensure the sustainability of the
resource for generations.
AHEC Europe would like to thank the NHLA
for their collaboration in producing this section.
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