jeffquitney
patreon
How to Use Crosscut Saws, Axes, Etc.: "Handtools for Trail Work" (Part 1) 1999 US Forest Service (USFS)
🕑 Added 2019-11-24 03:18:54 +0000 UTCmore at http://quickfound.net/
'Missoula Technology Development Center. Tools for Sawing, Brushing, Grubbing...'
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/Trail
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A trail is usually a path, track or unpaved lane or road. In the United Kingdom and the Republic of Ireland path or footpath is the preferred term for a walking trail. The term is also applied, in North America, to routes along rivers, and sometimes to highways. In the US, the term was historically used for a route into or through wild territory used by emigrants (e.g. the Oregon Trail). In the USA "trace" is a synonym for trail, as in Natchez Trace. Some trails are single use and can only be used for walking, cycling, horse riding, snowshoeing, and cross-country skiing; others, as in the case of a bridleway in the UK, are multi-use, and can be used by walkers, cyclists and equestrians. There are also unpaved trails used by dirt bikes and other off-road vehicles and in some places, like the Alps, trails are used for moving cattle and other livestock...
While most trails have arisen through common usage, the design and construction of good quality new paths is a complex process that requires certain skills.
When a trail passes across a flat area that is not wet, brush, tree limbs and undergrowth are removed to create a clear, walkable trail. A bridge is built when a stream or river is sufficiently deep to make it necessary. Other options are culverts, stepping stones, and shallow fords. For equestrian use, shallow fords may be preferred. In wet areas an elevated trailway with fill or a boardwalk is often used, though boardwalks require frequent maintenance and replacement, because boards in poor condition can become slippery and hazardous.
On slopes
Trail gradient are determined based on a site specific assessment of soils and geology, drainage patterns of the slope, surrounding vegetation types, position on the slope of a given trail segment (bottom, mid-slope, ridgeline), average precipitation, storm intensities, types of use, volume and intensity of use, and a host of other factors affecting the ability of the trail substrate to resist erosion and provide a navigable surface. Trails that ascend steep slopes may use switchbacks, but switchback design and construction is a specialized topic.
Trails accessible to off-road wheelchairs, have a grade no more than one in ten. Paved trail that are accessible to all wheelchairs, have a grade of be no more than one in twelve, with periodic level pull-offs.
On a well constructed trail the slope of the trail from side to side is never more than one in twelve, because side-sloped trails are prone to gullying. The ideal path is built almost, but not quite, level in cross-section.
To achieve a proper slope in hilly terrain a sidehill trail is excavated. This type of trailway is created with the establishing a line of suitable slope across a hillside, which is then dug out by means of a mattock or similar tool. This may be a full-bench trail, where the treadway is only on the firm ground surface after the overlying soil is removed and sidecast (thrown to the side as waste), or a half-bench trail, where soil is removed and packed to the side so that the treadway is half on firm old ground and half on new packed fill. In areas near drainages, creeks and other waterways, excavation spoils are taken away in bulk and deposited in an environmentally benign area. In problem areas trails are established entirely on fill. In such cases the soil is packed down firmly and the site is periodically checked to maintain the stability of the trail...
