Introduction cable yarding operations highlead live skyline running skyline demonstration contest l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 10

INTRODUCTION CABLE YARDING OPERATIONS HIGHLEAD, LIVE SKYLINE, RUNNING SKYLINE DEMONSTRATION/CONTEST PowerPoint PPT Presentation


  • 634 Views
  • Uploaded on
  • Presentation posted in: General

INTRODUCTION CABLE YARDING OPERATIONS HIGHLEAD, LIVE SKYLINE, RUNNING SKYLINE DEMONSTRATION/CONTEST. Cable Logging, Equipment & Systems. FOR 420 Feb 1, 2001 James Hart. CABLE YARDING.

Download Presentation

INTRODUCTION CABLE YARDING OPERATIONS HIGHLEAD, LIVE SKYLINE, RUNNING SKYLINE DEMONSTRATION/CONTEST

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Introduction cable yarding operations highlead live skyline running skyline demonstration contest l.jpg

INTRODUCTIONCABLE YARDING OPERATIONSHIGHLEAD, LIVE SKYLINE, RUNNING SKYLINEDEMONSTRATION/CONTEST

Cable Logging, Equipment & Systems

FOR 420Feb 1, 2001James Hart


Cable yarding l.jpg

CABLE YARDING

  • CABLE YARDING - MOVEMENT OF LOGS FROM STUMP SITE TO LANDING USING A MACHINE EQUIPPED WITH MULTIPLE DRUMS (OR WINCHES) OPERATED FROM STATIONALRY POSITIONS IN THE LANDINGS.

  • FIRST STEAM DONKEY (SMALL YARDER WITH A VERTICAL BOILER) WAS INVENTED ~1881 BY JOHN DOLBEER TO GROUND SKID LOGS IN OREGON

  • FIRST SKYLINE CABLE SYSTEM USED IN MICHIGAN ~ 1886 BY HORACE BUTTLER.

  • SYSTEMS STILL IN USE

OLD PNW YARDER


Basic cable yarding system components l.jpg

BASIC CABLE YARDING SYSTEM COMPONENTS

  • YARDER - TYPICALLY A RECTANGULAR FRAME BUILT FROM I BEAMS, WITH ENGINE AND DRUMS

  • TOWER, WITH GUY LINES

  • WIRE ROPE 6 STRANDS OF 19 WIRES EACH

    • MAIN LINE 1-1.25” -- HAULBACK LINE 3/4-7/8”

    • SKYLINE 1.5-2” -- OTHER MISC.

  • BLOCKS - PULLEYS

  • CKOKER - SHORT FLEXIBLE WIRE ROPE

  • BUTT RIGGING - COMBINATION OF CHAINLINKS, CLEVISES, AND SWIVELS CONNECTING

    • MAIN HAUL LINE

    • CHOKER OR GRAPPLE, AND

    • HAUL-BACK LINES

  • CARRAGE - COMBINATION OF PULLEYS, CABLE, ETC. THAT RIDE ON SKYLINE, ARE PULLED BY MAINLINE AND MAYBE A HAUL-BACK LINE, HAVE CHOKERS OR A GRAPPLE; AND PERHAPS A SLACKLINE


Highlead system l.jpg

HIGHLEAD SYSTEM

  • CLEARCUTS

  • CONSTANT SLOPES

  • 30-70% SLOPES, 1000’ DISTANCES

  • UPHILL YARDING

  • 2 DRUM YARDERS

  • DRUM -- MAINLINE -- BUTT RIGGING (with CHOKERS/GRAPPLE) -- HAUL-BACK LINE (with BLOCKS) -- DRUM

  • 20 LOGS/DAY


Highlead system cont l.jpg

HIGHLEAD SYSTEM [CONT]

SKAGIT 3-DRUM PORTABLE TOWER

WITH GUY LINES

CABLE LOGGED CORRIDOR IN PNW


Live skyline system l.jpg

LIVE SKYLINE SYSTEM

  • SKYLINE LIFTS LOGS

  • LIVE SKYLINE MOVES UP/DOWN TO GET CARRAGE TO LOGS

  • 2-DRUM YARDER IS ELEVATED, USES GRAVITY AND NO HAUL-BACK LINE

  • 30-90% SLOPES, 500-4000’

  • DRUM -- SKYLINE --ANCHOR (or TAIL-SPAR TOWER)

  • DRUM -- MAINLINE -- CARRAGE (with CHOKERS OR GRAPPLE)

  • ELEVATED OPERATION

    • ALLOWS PARTIAL CUTS

    • DECREASES DISTURBANCE

  • 470 LOGS/DAY


Running skyline system l.jpg

RUNNING SKYLINE SYSTEM

  • 3rd DRUM FOR HAULBACK LINE

  • DRUM -- SKYLINE --ANCHOR (or TAIL-SPAR TOWER)

  • DRUM -- MAINLINE -- CARRAGE (with CHOKERS OR GRAPPLE) - HAUL-BACK - DRUM

  • ELEVATED SKYLINE

    • ALLOWS PARTIAL CUTS

    • DECREASES DISTURBANCE

  • UPHILL OPERATION

  • 4th-DRUM CAN ADD SLACK-PULLER TO LOWER/RAISE CABLE AND KEEP SKYLINE STATIC

  • 30-90% SLOPES, 500-4000’

SLACK-PULLER CARRAGE


Cable logging systems advantages disadvantages l.jpg

can yard logs over ground on which tractors cannot operate

Running skylines operate in any direction

up-slope

down-slope

operate in any weather

less damaging to soil than tractor skidding

operates faster than tractor on same terrain

limited primarily by the line capacities of the yarder drums

the high-lead is used for only clear-cut

the cost of moving, and changing yarding road are fixed, not efficient for low volumes of harvesting

High costs per unit for low values per acre discriminates against small log operations

CABLE LOGGING SYSTEMS------------------------------------------ ADVANTAGES DISADVANTAGES


  • Login