Tree Felling, Wildland Fire, Chain Saws 2004 National Wildfire Coordinating Group

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'Wildland Fire Chain Saws - Part 8 - Tree Felling'

Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.

The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

https://en.wikipedia.org/wiki/Felling

Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/

Felling is the process of cutting down trees, an element of the task of logging. The person cutting the trees is a feller. A feller buncher is a machine capable of felling a single large tree or grouping and felling several small ones simultaneously...

Methods

Hand felling

In hand felling, an axe, saw, or chainsaw is used to fell a tree, followed up by limbing and bucking in traditional applications. In the modern commercial logging industry, felling is typically followed by limbing and skidding.

Feller buncher

A feller-buncher is a motorized vehicle with an attachment which rapidly cuts and gathers several trees in the process of felling them.

In cut-to-length logging a harvester performs the tasks of a feller-buncher, additionally doing the delimbing and bucking. When harvesting wood from a felled tree, the recommended methods should be followed in order to maximize wood recovery. The suggested trend is to make deeper cuts and smaller openness when performing undercuts.

Types of Cut

Undercut

It is the guiding or aiming slot for the tree and is a V-shaped notch placed on the side of the tree in the direction of Its intended fall. There are two types of undercut:

Standard Undercut

Reverse Undercut

Back Cut

The back cut is made on the opposite side of the tree of the undercut and severs the “hinge” holding the tree up. considerable stress may be released from the tree in making this cut...

https://en.wikipedia.org/wiki/National_Wildfire_Coordinating_Group

The National Wildfire Coordinating Group (NWCG) was formed in the United States as a result of the aftermath of a major wildfire season in 1970.

The 1970 fire season underscored the need for a national set of training and equipment standards which would be standardized across the different agencies. NWCG included representatives from the United States Forest Service, the Bureau of Land Management, the National Park Service, the Bureau of Indian Affairs, the U.S. Fish and Wildlife Service, and the National Association of State Foresters.

After a series of meetings in the early 1970s, the NWCG was officially chartered by the Secretaries of the Interior and Agriculture in 1976.

Among the notable results of the NWCG has been the adoption of the Interagency Fire Qualifications Rating system, more commonly known among firefighters as the "red card" qualification system; the establishment of the series of training classes associated with the red card system (such as the basic wildland fire course, S-130/S-190); the establishment of an interagency fire training center at Marana, Arizona; the publication of training manuals such as the Fireline Handbook; and the Resource Ordering Status System.

NWCG was formed independently of two other programs which also formed in the 1970s out of the need for greater interagency coordination: the Boise Interagency Fire Center (now the National Interagency Fire Center), and the FIRESCOPE program in southern California...