2442.1
Page 1 of 2
FOREST SERVICE MANUAL
ROGUE RIVER-SISKIYOU NATIONAL FOREST
MEDFORD, OREGON
FSM 2400 – TIMBER MANAGEMENT
CHAPTER 2440 – DESIGNATING, CRUISING, SCALING, AND ACCOUNTABILITY
RRS Supplement No.: 2400-2008-1.
Effective Date: May 6, 2008
Duration: This supplement is effective until superseded or removed.
Approved: SCOTT D. CONROY
Forest Supervisor
Date Approved: 05/06/2008
Posting Instructions: Supplements are numbered consecutively by title 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
Superseded Document(s) by
Issuance Number and
Effective Date
2442.1
2 Pages
None
Digest: This supplement is to be used to obtain the volume of estimated quantities sold when
the unit of measure is tons for timber sales.
RRS SUPPLEMENT 2400-2008-1
EFFECTIVE DATE: May 6, 2008
DURATION: This supplement is effective until superseded or removed.
2442.1
Page 2 of 2
FSM 2400 – TIMBER MANAGEMENT
CHAPTER 40 – DESIGNATING, CRUISING, SCALING, ACCOUNTABILITY
2442 – TIMBER CRUISING
2442.1 – Volume Estimators
In preparing timber sales to be sold using estimated quantity of products to be removed with
green tons as the unit of measure in A2 of the 2400-6 contract. The following pounds per gross
cubic foot will be used. The following pounds per cubic foot data are applicable to green sales
only.
Species
Douglas Fir <15 inches
Rogue
River/Siskiyou NF
Douglas Fir >15 inches
White Fir – all diameters
Ponderosa Pine <15 inches
Ponderosa Pine >15 inches
Port-Orford & Incense Cedar
Red Alder - all diameters
Sitka Spruce - all diameters
Example: Timber Sale Contract A2 Tons Calculation:
(1)
(2)
(3)
(4)
Cruise
Gross
Weight
Pounds
Percent
Pounds
Species
Cu Ft
Factor
Standing Removed Removed
205
2,004
59
118,236
95%
112,324
Pounds per Gross
Cubic Foot
59
51
60
65
60
61
57
54
(5)
Tons
Removed
56.16
(1) Weight Factor = Pounds Per Gross Cubic Foot (from supplement above)
(2) Pounds Standing = Gross Cubic Feet x Weight Factor
(3) Percent Removed = % Material Hauled out on Trucks
(4) Pounds Removed = Pounds Standing x (Percent Removed/100)
(5) Tons Removed = Pounds Removed / 2,000
(6) Contract A2 Tons = Tons Removed rounded to the nearest whole Ton
(6)
Contract
A2 Tons
56