2 edition of **Determining average yarding distance** found in the catalog.

Determining average yarding distance

Roger H Twito

- 223 Want to read
- 19 Currently reading

Published
**1979** by Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in Portland, Or .

Written in English

- Computer programs,
- Logging -- United States,
- Timber -- United States

**Edition Notes**

Issued Mar. 1979

Statement | Roger H. Twito and Charles N. Mann |

Series | USDA Forest Service general technical report PNW ; 79, General technical report PNW -- 79 |

Contributions | Mann, Charles N., joint author, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), United States. Forest Service |

The Physical Object | |
---|---|

Pagination | 29 p. : |

Number of Pages | 29 |

ID Numbers | |

Open Library | OL13602676M |

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Get this from a library. Determining average yarding distance. [Roger H Twito; Charles N Mann; Pacific Northwest Forest and Range Experiment Station (Portland, Or.); United States. Forest Service.] -- "Emphasis on environmental and esthetic quality in timber harvesting has brought about increased use of complex boundaries of cutting units and a consequent need for a rapid and accurate method The calculation of average yarding distance to a centralized landing, given a polygonal mesh approximation of the setting surface FRANCIS E.

GREULICH Department ofForest Products and Engineering, AR,University of Washington, Seattle, WAU.S.A. Received J distance is feet and the yarding slope is 20 percent on the setting then the following setting parameters are readily calculated: feet for average yarding distance (AYD), 20 percent for average yarding slope (AYS),feet-squared for expected square of the yarding distance (ED2), percent-squared for expected rapid and accurate method of determining the average yarding distance and area of these units.

These values, needed for evaluation of road and landing locations in planning timber harvests, are easily and accurately determined by a desk-top computer and Buy Determining average yarding distance (General technical report PNW) by Roger H Twito (ISBN:) from Amazon's Book Store.

Free UK delivery on eligible orders. Free UK delivery on eligible orders. The average yarding distance was feet and the average slope was about 30%.(AYD).html. PRODUCTIVITY, COSTS, AND OPTIMAL SPACING OF SKYLINE CORRIDORS OF TWO C A B L E YARDING SYSTEMS IN PARTIAL CUTTING OF SECOND-GROWTH FORESTS OF C O A S T A L BRITISH COLUMBIA by D A G RUTHERFORD, R.P.F.

S.F, University of British Columbia, A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF The concept of an average allows statisticians, demographers, economists, biologists, and other researchers to better understand the most common situations.

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Let us know if we missed one. The moving average is a great indicator, primarily because of its simplicity. It is also due to its ability to produce various types of :// Side slope-The average slope of the ground, in percent, along a yarding road on either side of a centerline.

Single-span skyline – A skyline without intermediate supports. Single span skylines are classified as short span if they reach out less than ft to the tailblock and long span if they exceed ft.

Note, External yarding Net (paid) hours/day Assumed to be hours/day for all logging systems = except for=20 CTL ( hours/day) and helicopter ( hours/day).

As average net hours/day for helicopter yarding can = vary=20 significantly, manual adjustments can be made within the Total = Site=20 Cost worksheet of the Helicopter Yarding = Guide.

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The two main costs to timber harvest are road building costs and yarding costs. As road density (and cost) increases, yarding distance (and cost) Stopping Sight Distance as a Design Measure and Access Management Measure Stopping sight distance is required at all locations along the highway, to see an object in the roadway with enough distance to stop.

The stopping sight distance is typically required through all intersections that are not “stop” or “yield” :// / Average This is the arithmetic mean, and is calculated by adding a group of numbers and then dividing by the count of those numbers.

For example, the average of 2, 3, 3, 5, 7, and 10 is 30 divided by 6, which is 5. Median The middle number of a group of numbers. Half the numbers have values that are greater than the median, and half the numbers 4 Average yarding distance is external slope distance times factor of Average external slope distance of standing green timber area was feet; average external slope distance of blowdown area was feet.

Matthews, Donald M. Cost control in the logging industry. pp., illus. New York: McGraw-Hill Book Co. For an extraction distance of m, a lateral yarding distance of 43 m and a payload of m3 per turn, the yarding cycle time was estimated to about min.

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In one of the previous articles, we discussed three essential functions for calculating average in Excel, which are very straightforward and what if some of the values have more "weight" than others and consequently contribute more to the final average. This case study analyzed the performance of a start-up cable yarding crew in southern China through operational monitoring by consecutive time studies, long-term log book recordings and efficiency evaluation by stochastic frontier analysis (SFA).

The crew, which used a KOLLER K H mobile tower yarder, was monitored for two years. During this period, detailed data recordings of yarding Average yarding distance on irregular-shaped timber harvest settings.

Portland, Ore.: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, (OCoLC) Document Type: Book: All Authors / Contributors: Penn A Peters; J Doyle Burke; Pacific Northwest Forest and Range Experiment Station Road Network Optimization in Cable Yarding Operations Using Network Analysis and Mixed Integer Programming to Minimize Total Cost.

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