Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.84 MB bytes)

Title: Estimating load weights with Huber's Cubic Volume formula: a field trial.

Author: Waddell, Dale R.;

Date: 1989

Source: Res. Note. PNW-RN-484. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

Publication Series: Research Note (RN)

Description: Log weights were estimated from the product of Huber's cubic volume formula and green density. Tags showing estimated log weights were attached to logs in the field, and the weights were tallied into a single load weight as logs were assembled for aerial yarding. Accuracy of the estimated load weights was evaluated by comparing the predicted with the actual load weights as measured with scales in a helicopter. A total of 110 loads were evaluated. The load weights were accurate (about 10-percent error), and the method was easily applied under difficult logging conditions. The number of aborts caused by inaccurate estimation of load weights was small (six). Increased efficiency provided by accurate estimates of load weights was often negated during the assembly of loads and in the hooking operation. Greater yarding productivity can be achieved when an accurate log weight estimation technique is combined with efficient load assembly and hooking operations.

Keywords: Aerial logging, weight estimation, logging productivity

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)



Waddell, Dale R. 1989. Estimating load weights with Huber''s Cubic Volume formula: a field trial. Res. Note. PNW-RN-484. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.