pantheraba
More biners!!!
I had a 15"dbh oak leaning over my house...I had roped out the pieces over the house solo...cut them small enough to toss. That left a 45 foot leaning remainder. My inclination was to rig it out in pieces, swing them from the nearby sweetgum. My son suggested we take the whole piece...hang it and cut pieces off from the ground. Then we decided to see if we could just lower the whole thing.
I decided to see what the math thought about that...have not pushed equipment limits intentionally before.
Per TreeStuff rope data for Sampson 9/16" Stable braid:
Diameter: 9/16" (15mm)
Average Breaking Strength: 13,300lbs (6,000kg)
Work Load Limit: 2,600lbs (1,200kg)
One of the log charts I found was based upon log diameter midspan. I estimated 12" diameter mid log and worked out to a weight of 43 lbs per ft.
+ 43.00 lbs/ft
* 45.00 ft
-- -------------
+ 1,935.00 lbs for the spar.
I used another log chart and came up with a projected weight of just over 2,000 lbs.
So, using 3/4 Tenex, big block and a strong support tree and port-a-wrap we gave it a go. Probably ended up having the tree hung for about 10 minutes...it did not rotate out past the house like I planned and I had to set up a tag/pull line to pull it into the available drop slot.
I assume this is how y'all go about deciding whether to hang a tree or not?
The boys weren't crazy about coming outside for the show but that's life (we wanted them in sight, not running outside in the middle of the rigging operation). 1080 HD is an option.
<iframe width="560" height="315" src="https://www.youtube.com/embed/7tB22O4X-ws" frameborder="0" allowfullscreen></iframe>
I decided to see what the math thought about that...have not pushed equipment limits intentionally before.
Per TreeStuff rope data for Sampson 9/16" Stable braid:
Diameter: 9/16" (15mm)
Average Breaking Strength: 13,300lbs (6,000kg)
Work Load Limit: 2,600lbs (1,200kg)
One of the log charts I found was based upon log diameter midspan. I estimated 12" diameter mid log and worked out to a weight of 43 lbs per ft.
+ 43.00 lbs/ft
* 45.00 ft
-- -------------
+ 1,935.00 lbs for the spar.
I used another log chart and came up with a projected weight of just over 2,000 lbs.
So, using 3/4 Tenex, big block and a strong support tree and port-a-wrap we gave it a go. Probably ended up having the tree hung for about 10 minutes...it did not rotate out past the house like I planned and I had to set up a tag/pull line to pull it into the available drop slot.
I assume this is how y'all go about deciding whether to hang a tree or not?
The boys weren't crazy about coming outside for the show but that's life (we wanted them in sight, not running outside in the middle of the rigging operation). 1080 HD is an option.
<iframe width="560" height="315" src="https://www.youtube.com/embed/7tB22O4X-ws" frameborder="0" allowfullscreen></iframe>