rbtree
Addicted to ArboristSite
Today's tree was a very dead bigleaf maple, about 60 feet tall, 22 inch dbh, 4 leaders about 9-11 inches each, and right over a carport. No access possible with crane or bucket. About 18 feet away, and growing right through a port in the carport roof, is a 100 foot hemlock. 12 feet the other side was a maple.
I climbed the hemlock, and installed a lifeline in the top. I tossed a throw line through the upper dead maple canopy. We had already installed a line in the live maple. We pulled this line up through the dead tree and into the hemlock. In it's middle, we attached two blocks, 3 feet apart, with butterfly knots. One flew a second lifeline, athe other a lowering line. We then tensioned the tight line with fiddle blocks.
Some reasons why we ran the lifeline and lowering line off the same tight line: to save rigging, the maple wood was very light, and I had another lifeline in the hemlock.
I gingerly climbed as high as possible, and tied each of the four leaders off, cinching the leader in three places in case of breakage. On some, I also slung a couple branches to the line in case they broke. Then, I rapped down to about 15 feet above the carport, attached a tag line, which ran to the chipper winch, made a steep sloped face cut, and sloping backcut. When each came off, there was a bit of a shower of falling bark, and small branches.
Here's a few pics, which are not very good. I may later try to draw in some of the lines so you can better see what is going on.
I climbed the hemlock, and installed a lifeline in the top. I tossed a throw line through the upper dead maple canopy. We had already installed a line in the live maple. We pulled this line up through the dead tree and into the hemlock. In it's middle, we attached two blocks, 3 feet apart, with butterfly knots. One flew a second lifeline, athe other a lowering line. We then tensioned the tight line with fiddle blocks.
Some reasons why we ran the lifeline and lowering line off the same tight line: to save rigging, the maple wood was very light, and I had another lifeline in the hemlock.
I gingerly climbed as high as possible, and tied each of the four leaders off, cinching the leader in three places in case of breakage. On some, I also slung a couple branches to the line in case they broke. Then, I rapped down to about 15 feet above the carport, attached a tag line, which ran to the chipper winch, made a steep sloped face cut, and sloping backcut. When each came off, there was a bit of a shower of falling bark, and small branches.
Here's a few pics, which are not very good. I may later try to draw in some of the lines so you can better see what is going on.