Burnham
Woods walker
I've been compiling a set of photos for inclusion on the USFS Treeclimbing progam website, and though y'all might enjoy some of these from one of our advanced rigging workshops. I may have posted a few these before, but if so it's been one or two versions of the THouse ago 
.
This was a training excercise, on a windthrown leaner, a Doug fir about 100 feet tall. We set two climb lines in adjacent trees, one on each side of the leaner, so if our climber lost footing, no pendulum swings would occur.
We then set up a zipline and dumped the top and short logs off onto it, transfering their weight into a third neighboring tree to take the shock before loading the zip fully and pulling them off to the side with a haulout/back carriage.
It took 4 guys on the ground to run all the ropes. This is certainly the most complex rigging system I've ever helped set up and run.
The last 40 foot section was a controlled drop/letdown with two control lines. I faced it very wide and the hinge never broke as we laid it down on the ground in slow motion. Two ropemen on this.
Here's the pics of rigging out the top and upper sections.
.This was a training excercise, on a windthrown leaner, a Doug fir about 100 feet tall. We set two climb lines in adjacent trees, one on each side of the leaner, so if our climber lost footing, no pendulum swings would occur.
We then set up a zipline and dumped the top and short logs off onto it, transfering their weight into a third neighboring tree to take the shock before loading the zip fully and pulling them off to the side with a haulout/back carriage.
It took 4 guys on the ground to run all the ropes. This is certainly the most complex rigging system I've ever helped set up and run.
The last 40 foot section was a controlled drop/letdown with two control lines. I faced it very wide and the hinge never broke as we laid it down on the ground in slow motion. Two ropemen on this.
Here's the pics of rigging out the top and upper sections.
.
