2409.12, 20
Page 1 of 2
FOREST SERVICE HANDBOOK
OTTAWA NF (REGION 9)
IRONWOOD, MI 49938
FSH 2409.12 – TIMBER CRUISING HANDBOOK
CHAPTER 20 – ESTIMATING TREE VOLUME AND WEIGHT
Supplement No.: 2409.12.20-2015-1
Effective Date: November 2, 2015
Duration: This supplement is effective until superseded or removed.
Approved: LINDA L. JACKSON
Forest Supervisor
Date Approved: 10/23/2015
Posting Instructions: 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.
New Document
2409.12, 20 – 2015-1
Superseded Document(s)
(Supplement Number and
Effective Date)
2409.12, 20 – 2011-2
Digest: 2015 Currency Review – Reissue with no change in content
Pages
2
2
R9 OTTAWA NATIONAL FOREST SUPPLEMENT
EFFECTIVE DATE: November 2, 2015
DURATION: This supplement is effective until superseded or removed.
2409.12, 20
Page 2 of 2
FSH 2409.12 – TIMBER CRUISING HANDBOOK
CHAPTER 20 – ESTIMATING TREE VOLUME AND WEIGHT
22.31a - Volume Distribution in Trees
22.31a-1 - Appling Defect to Multi-Product Trees
When utilizing the volume distribution chart to apply defect to multi-product trees (a tree with
both sawtimber and pulpwood) treat each product as a seperate section (stem). The following
example clarifies the proper procedure:
You are cruising a tree with 4 bolts of sawtimber and 3 bolts of topwood (7 bolts total height).
Sawtimber Defect: The first bolt of sawtimber is cull; so you look up the percent volume in the
first bolt of a 4 bolt tree, which is 33%. Enter "30" as the sawtimber defect percent. We round
defect to the nearest 10%.
Topwood Defect: The 6th bolt (or the middle bolt of the 3 topwood bolts) is also cull; so find the
percent volume for the 2nd bolt of a 3 bolt tree from the distribution chart. The chart shows 32%
so enter "30" as the topwood defect.