Relevant

Felling The Tree

There are many things to do and consider before starting to fell a tree. Examine the tree; which way does it lean and how is it weighted? This has a lot to do with the direction it will fall. Is that area clear of people, power and utility lines, or anything that would be hit? Clear the area of people, vehicles, branches and debris.

If an electric power line is in the vicinity of the tree, don't attempt to work on the tree unless you are absolutely certain that it will not interfere with the electric line. If the tree must be removed and you suspect there will be a problem, call the power supplier, they have the expertise to do it safely.

Will the wind have an effect on how and where the tree will fall? What about other trees? A very dangerous hazard is made when the cut tree entangles with another and does not fall completely. Determine the direction of fall carefully as well as an escape route. Don't wait until the tree is falling to decide which way you should move to avoid being hit.

Always plan an escape route to a safe location from where you are working. Your path of retreat should be along a line approximately 45 degrees from the direction of fall of the tree (Figure 3). This is most important when cutting (felling) trees. Select a place to set the chain saw; it is never recommended to run with a chain saw in your hand, operating or not. Turn off the chain saw and set it down; it is replaceable -- you are not.

Figure 3. Plan a safe, unobstructed path of retreat before making felling cut. When tree begins to fall, remove safe, stop motor, set it on ground and retreat rapidly at 45-degree angle from line of fall.

Plan the cuts carefully. Smaller trees (up to a 6 inch diameter) may be cut clear through with one pass. Larger trees may require a series of cuts as shown in Figure 4.

Figure 4.

Start with a 45 degree notch on the side that the tree will fall towards. Cut the bottom of the notch first, about one third of the way through the diameter. The second cut is made at a 45 degree angle that will meet the depth of the first cut. The felling cut should be made from the opposite side, about 2 inches higher than the floor of the notch. Do not cut all the way through but leave a hinge that will keep the tree from kicking back and upward as it falls. The hinge will be about 1/8 to 1/6 of the diameter where you are cutting but it may vary depending on when the tree starts to fall.

When the tree starts to fall, it is time to shut off the chain saw, set it down safely (don't throw it), and leave on your planned escape route. Do not return to the site until the tree is down and no longer moving. If the tree should roll, let it; one person cannot stop or control a moving tree.

If a tree happens to be so well balanced that it does not fall after a felling cut has been made, two wedges can be used to start the fall and influence its direction. Always use two wedges and a sledge that has a face 1/3 larger than the face of the wedge.

Plastic wedges are safer than metal since they will not damage the saw teeth or chain. Always remove the chain saw when wedges are being driven into the cut. Strike the wedge carefully since a careless blow may cause the wedge to pop out of the cut and allow the tree to fall backward, on you.

Never use an axe as the wedge or driver; the head of the axe may shatter and you could be injured by pieces of it. If cutting must be continued, insert the chain saw into the cut very carefully since the conditions are extremely dangerous.