Forest Service Handbook pacific northwest region (region 6)



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2409.11a, 21.21

Page of









Forest Service Handbook

pacific northwest region (region 6)

portland, oregon


fsH 2409.11a – national forest cubic scaling handbook
chapteR 20 – cubic log scaling rules
R6 Supplement No.: 2409.11a-2006-1
Effective Date: May 5, 2006
Duration: This supplement is effective until superseded or removed.


Approved: jim golden

For the Regional Forester



Date Approved: 5/4/2006


Posting Instructions: Paper copies of this supplement should be printed on blue 6” x 9” paper. Supplements are numbered consecutively by Handbook number and calendar year. Post by document; remove the entire document and replace it with this supplement. Retain this transmittal as the first page(s) of this document. The last supplement to this Handbook was R6/PNW FSH 2409.11a-2004-1 to Chapter 20.


New Document

R6 Supp. FSH 2409.11a, 21.21

6 Pages

Superseded Document(s)


None

None


Digest:

2409.11a, 21

Adds technical direction for scaling a single piece that contains two products with different product specifications.



TABLE OF CONTENTS

21 - Log Measurements and Determining Gross Cubic Foot Volume 3

21.21a - Length Determination When Minimum Piece Specifications are Different by Product 3

21.21a - Exhibit 01

One Piece - Two Products with Substandard Portion 4

21.21a - Exhibit 02

One Piece - One Product with Substandard Portion 5

5

21.21a - Exhibit 03



One Piece - Two Products 6

6




21 - Log Measurements and Determining Gross Cubic Foot Volume

21.21a - Length Determination When Minimum Piece Specifications are Different by Product

The timber sale contract establishes minimum piece specifications for scaling products. Some timber sale contracts list different minimum piece specifications for sawlog and non-sawlog products. Minimum piece specifications are provided on the Scaler Information Form, R6-FS-2400-29.


A single piece may be presented for scale which contains both products. When this occurs, first determine the length of the sawlog portion, as described in section 21.21. The remaining portion is then measured for non-sawlog specifications, as described in section 21.21. Each product is recorded as a separate piece. Any portion of the piece that does not meet minimum specifications for either product is substandard material and is not recorded. Reference exhibits 1, 2, and 3 of this supplement.
Use the following minimum length and diameter specifications for all exhibits:
Scaler Information Form R6-FS-2400-29



21.21a - Exhibit 01

One Piece - Two Products with Substandard Portion



Assess piece for sawlog product specifications first. Determine the length that meets sawlog minimum specifications, allowing for full trim. Record in even 2-foot multiples.



Sawlog Product

Measured length = 8.5 feet

Recorded length = 8 feet

Recorded small end diameter = 6 inches

Recorded large end diameter = 7 inches
Assess the remaining portion for non-sawlog product specifications. Determine the length that meets non-sawlog minimum specifications, allowing for full trim. Record in even 2-foot multiples as a separate piece.

Non-Sawlog Product

Measured length = 23.0 feet

Recorded length = 22 feet

Recorded small end diameter = 4 inches

Recorded large end diameter = 6 inches
Any portion not meeting either sawlog or non-sawlog product minimum specifications is substandard material and is not recorded.

21.21a - Exhibit 02

One Piece - One Product with Substandard Portion


Assess piece for sawlog product specifications first. Determine the length that meets sawlog minimum specifications, allowing for full trim. Record in even 2-foot multiples.

Sawlog Product

Measured length = 27.0 feet

Recorded length = 26 feet

Recorded small end diameter = 6 inches

Recorded large end diameter = 8 inches
The remaining portion does not meet non-sawlog product specifications for minimum length; therefore the remaining portion is substandard material and is not recorded.


21.21a - Exhibit 03

One Piece - Two Products



Assess piece for sawlog product specifications first. Determine the length that meets sawlog minimum specifications, allowing for full trim. Record in even 2-foot multiples.

Sawlog Product

Measured length = 20.5 feet

Recorded length = 20 feet

Recorded small end diameter = 6 inches

Recorded large end diameter = 8 inches
Assess the remaining portion for non-sawlog product specifications. Determine the length that meets non-sawlog minimum specifications, allowing for full trim. Record in even 2-foot multiples as a separate piece.

Non-Sawlog Product

Measured length = 15.5 feet

Recorded length = 14 feet

Recorded small end diameter = 4 inches

Recorded large end diameter = 6 inches

We want example 3 in both supplements to have the same segment length change, 14 feet changed to 15 feet. I fixed the figure above already.




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