An earth anchor system: installation and design guide.

R.L. Copstead; D.D. Studier

doi:10.2737/PNW-GTR-257

Treesearch

An earth anchor system: installation and design guide.

Informally Refereed

Authors:

R.L. Copstead, D.D. Studier

Year:

1990

Type:

General Technical Report

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-GTR-257

Source:

Gen. Tech. Rep. PNW-GTR-257. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 35 p

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Download (PDF 1.11 MB): https://research.fs.usda.gov/download/treesearch/9106.pdf

Abstract

A system for anchoring the guylines and skylines of cable yarding equipment is presented. A description of three types of tipping plate anchors is given. Descriptions of the installation equipment and methods specific to each type are given. Procedures for determining the correct number of anchors to install are included, as are guidelines for installing the anchors so that they will reliably withstand the forces imposed on them in this application. Charts for determining the number of anchors to install and bridle together are included. Information presented is based on field tests conducted under various of conditions in California, Oregon, and Washington.

Keywords

Logging, anchors, cable yarding, machine anchors, soft earth anchoring

Citation

Copstead, R.L.; Studier, D.D. 1990. An earth anchor system: installation and design guide. Gen. Tech. Rep. PNW-GTR-257. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 35 p