BC Faller Training Standard - Bucking (17 of 17)

a pivot point is any object that can affect the logs balance when cut as a log is cut and the load shifts a pivot point could cause one end of the log to swing downhill and the other end of the log to pivot uphill towards the faller to avoid having the log pivot the follower makes his cuts so the log will roll free of the stomach in this situation the faller chooses a buckin length as close to the stump as possible to maximize log length while maintaining a safe position brush out any debris that could fall or fly back at you when the log drops and clear an escape route you you you before you start to buck any tree you need to assess the area for hazards the faller must assess each tree so he knows what will happen when he makes his cut in this blowdown situation the faller identifies a danger tree which could fall on and while he's bucking the log the faller must remove the tree before he begins bucking in this situation the lay of the tree makes it difficult to determine the bind also the fact that this tree is lying on top of another tree as to the danger the faller chooses the safest bucking position available to him he avoids standing in the V of the two trees which would limit his ability to escape he also avoids standing on the lower tree which could shift or roll when the cut drops as you measure the tree determine the safest place to stand to make the cut you must always cut from the high side of the tree check the tree for stability and determine what it's likely to do when cut because this tree has a small amount of top bind to simple cuts are all that is needed top cut 1/4 the diameter of the tree start your bottom cut making sure it lines up with the top cut move out of the way as the log drops on smaller trees it's acceptable practice to tape and limb the tree at the same time as you measure the tree determine the safest place to stand to make the cut you must always cut from the high side of the tree brush out a working area and escape route and remove all debris check the tree for stability and determine what it's likely to do one cut because this tree has a small amount of bottom bind to simple cuts are all that is needed under buck 1/4 the diameter of the tree line up the bottom cut and make a second cut starting at the top move out of the way as the log drops bind is involved in virtually every bucking situation because stumps windfalls and other objects prevent trees from lying flat the hazards for the faller are that the bar will become pinched or they will be struck by the falling log bind creates two different pressure points resulting in the wood on one side of the tree being compressed while the wood on the other side is under tension this tree has a top bind because it's being supported at both ends the force of the bind is pushing down you start your cut on the far side making sure you cut the bottom corner then come back and make your top cut make your final cut reaching under and up cutting the wood furthest from you the father makes his last cut up from the bottom to relieve the tension and allow the log to fall away the faller assesses the tree he identifies that it's well supported but has a potentially dangerous pivot point if this pivot point is not removed before the tree is cut the butt end will drop away and the cut end will swing up potentially striking the faller the faller removes any branches that could cause a kickback the faller kneels down on top of the tree and makes the first of two cuts the purpose of these two angled cuts is to reach the outside lower corner finish the sidecut by cutting into the center of the tree scribe down 3/4 of the diameter of the tree and Borean continue to bore into the center of the tree and then cut all the way through to the bottom now sawed down from the top of the tree and cut the holding wood reach as far around the tree as possible and cut the bottom corner once these cuts are complete the faller can never return to the lower side of the tree the faller bores into the center of the tree and then cuts all the way through to the bottom Oh Oh the faller cuts down through the holding wood move out of the way as the log drops in this scenario the tree is supported at both ends creating a heavy top bind at the bucking length this puts the tree under extreme compression when bucking the holding wood can break with sudden force putting the faller at risk to control this reaction the faller makes a v-notch at the top of the tree this relieves the compression allowing the log to drop in a controlled manner

Channel: WorkSafeBC

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Keywords: worksafebc, worksafe, bc, forestry

Id: Z7jYMJ-knes

Length: 17min 32sec (1052 seconds)

Published: Fri Aug 31 2012