Presentation CABLE YARDING OPERATIONS HIGHLEAD, LIVE SKYLINE, RUNNING SKYLINE DEMONSTRATION

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

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. To begin with 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. Frameworks STILL IN USE OLD PNW YARDER

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. Squares - 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 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] SKAGIT 3-DRUM PORTABLE TOWER WITH GUY LINES CABLE LOGGED CORRIDOR IN PNW

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 third 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 fourth DRUM CAN ADD SLACK-PULLER TO LOWER/RAISE CABLE AND KEEP SKYLINE STATIC 30-90% SLOPES, 500-4000' SLACK-PULLER CARRAGE

can yard logs over ground on which tractors can't work Running horizons work in any bearing up-slant down-incline work in any climate less harming to soil than tractor sliding works quicker than tractor on same landscape constrained basically by the line limits of the yarder drums the high-lead is utilized for just obvious the cost of moving, and changing yarding street are settled, not proficient for low volumes of collecting High expenses per unit for low values per section of land oppresses little log operations CABLE LOGGING SYSTEMS - - - ADVANTAGES DISADVANTAGES