tree felling techniques diagrams
The same boring procedure is then performed on the other side of the tree ensuring. Plastic wedges and a STIHL axe built for felling are vital to maximizing the efficiency of your felling operation.
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25 Conventional Directional Notch.
. The condition of the tree the terrain and local. Proceed to make the felling cut Choose a suitable felling cut for the tree. The number two cut is made as per the diagram at the same plane as cut number one.
26 Humboldt Directional Notch. You should also mark the direction and height of the stump. The cut must accurately face the desired direction of fall and finish level.
First and foremost verify your Husqvarna saw has fresh oil along with a new or sharpened chain. 3 Using a Chainsaw to Cut a Notch and Hinge. Tree felling training usually happens on the job and includes.
The hinge guides the tree down during the felling and as the directional notch closes the hinge breaks and separates the tree from the stump. 31 Open-Faced Directional Notch. It has to be inserted before completing the felling while you stand on the lever arm.
The directional notch is made in two parts. Make A Back Cut. 23 Back Cut or Felling Cut.
Top cut This cut can begin at any height as long as enough room is allowed for the undercut. Fell the lean of the tree whenever possible and into clear areas. This job is a large mature Black Locust tree with a nasty split on a very large stem overhanging a coachhouse.
Make sure to use plastic wedges as opposed to metal. The final cut of tree felling is the back cut. Make the cut approximately 18-20 inches from the ground no higher than your hip at a right angle.
Either that or the tree will begin to fall. Be sure to have a safe and clear work zone as well as a clearly defined exit path. As the video demonstrates when youre using a chainsaw to fell a tree its important to plan carefully.
Quick animated sequence to show the expected outcome of implementing the steps describ. The top cut and bottom cut. There are several techniques to cut a tree stump.
TREE FELLING 19 allows the tree to fall freely in the chosen direction. Then make sure that the area you are felling has a 45-degree angle to the ground as this will make it easier to make both cuts exactly meet. Make the back cut go deep into the middle but let it.
Then use one of the appropriate chainsaw techniques listed above to perform the correct and safest cut. When felling a tree the rule of thumb is to make the depth of the notch one-fifth of the tree trunks diameter. Meaning that you need a hinge to help you control the felling.
The angle of the top cut is key in ensuring the job is done right. Felling in another direction requires a special technique more effort and is sometimes just impossible. You also will need to know the proper ending point usually when the cut reaches 30-40 of the trees diameter.
The goal is to make the angles as shown in the diagram or as close as you can. Retreat from a falling tree at a 45æ angle away from the direction of the fall at least 20 feet from the tree. The bottom cut must be made level to meet the top.
21 Top Cut. This cut is created on the opposite side of the notch. The directional notch can be made in a number of ways.
The cut should be made ¼ of the diameter of the tree or up to ⅓ of the diameter but no deeper. Felling a tree can be done using two methods. Never leave a lodged tree as any vibration from machinery or a sudden wind could bring it down on a crew member or an unsuspecting person.
Illustrates how to fell a tree using the Notch and Back-Cut technique. In the following video you can learn proper methods for creating different notches and techniques for maintaining a. By using these proper chainsaw cutting techniques you should be able to take care of most common tree cutting jobs.
When your V-shaped cut is ready go to the opposite side of the tree and make another cut. The tree is bored out cutting back from the notch leaving a good hinge and sufficient holding wood. This video walks you through both processes and helps you decide if.
The conventional cut and the open-face cut. The hinge is formed by the directional notch and the final felling cut. Make another cut into the notch above your first cut at a 45-degree angle to cut out all of the wood for a clear hinge.
The felling cut should be in line with or slightly above the level of the bottom cut. Felling a tree can be done using two methods. First of all you should mark the direction and height of the tree where youre cutting.
Plastic wedges are far less likely to dull your saw chain if it comes in contact with the wedge. The top cut is made first at a 45 angle between one-quarter and one-third of the trees diameter. Other methods Here we have presented an overview of four.
Additionally youll want to invest in personal protection equipment including gloves ear and eye protection. This cut should be made about 3 inches above the bottom of the V-shaped cut. Making the Cuts Special Techniques for Felling Difficult Trees.
The felling cut should meet the point of the notch. Then make the top cut of the tree by axing the wood. 22 Undercut or Bottom Cut.
The easiest choice is to fell the tree in the direction it would naturally fall due to slope overhang and wind direction. Watch the video. Safe felling of a tree includes making three precise cuts.
You should ensure that it links about 95 of the tree. When the tree starts to fall the hinge will help guide the tree to fall in the desired direction. If the tree is wider than the guide bar supplement both the top and bottom cuts from the other side.
24 Open-Faced Directional Notch. RULE 251 The employer must ensure that a competent person is in charge of each operation who must supervise and ensure work is supervised and performed. Hazard identification safety instruction health and safety rules and environmental compliance.
Sizeup Search For Overhead Hazards Debris Falling From Above Causes Over One-half Of All Felling Accidents Practice Watching Overhead While Cutting Occasionally Glance At The Saw Kerf And Top Of The Tree Check For Snags Standing Dead Or Dying Tree Snags May Fall At Any Time Due To Wind Or Vibration From A Felled Tree Cut Any Snags In The Felling Area First. Minimises splitting or slabbing.
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