Tree Lopping, Removal, Pruning and Mulching in the Dandenong Ranges

From the Blog

This is the page I’ll be updating with the results

During the early 1990′s, Graeme McMahon monitored the heart rates of climbers using various canopy access systems.
In comparing spurs, prussic, frog and yosemite, he found the single rope technique (SRT) systems were an efficient method of access.
This had been long known within the caving, rock climbing and other rope access industries.

The video was part of a presentation to Arboricultural Association of Australia (AAA), included was Graemes research.
In the coming weeks, I’ll be making a post on our website with the charts, tables and documentation as pdfs.

Tape was used in the systems, as part of the research was to compare the efficiency gains/losses of shortening and lengthening these. Modern systems are tailor made to the right length to reduce bulk.

The material from the presentation is included below.

Trivect Presentation Slides

Trivect Software

The program hasn’t been updated since I wrote it, normally before this kind of thing would be shared it would go through fairly vigorous bug testing.

If I get some time to neaten it up I will fix some of the major bugs. I will point out some major things to consider:

  • Don’t use angles outside of -90 and 90 degrees. Apart from being completely pointless, in a practical sense it would be dangerous. One day I’ll write some restrictions that stop those kind of numbers being entered
  • Have a good think about what the program is telling you to do.
    • Is it realistic?
    • Will my high points handle that kind of load?
    • Are those vertical components what I would expect?

Apart from that, the formula, presentation, source code and software are provided under a create commons licence. To find out what that means visit http://creativecommons.org/licenses/by-nc-sa/3.0/au/deed.en

 

Congratulations to Joe Harris and Kiah Martin on their placings in this years championships! More photos to come!

2011 ITCC Masters Results:

Womens Masters
1. Chrissy Spence, New Zealand: 155.67 points
2. Jessica Knott, Australia: 144.8 points
3. Kiah Martin, Australia: 90.67 points

Mens Masters
1. Scott Forrest, New Zealand: 237.67 points
2. Joe Harris, Australia: 237.00 points
3. Jonathan Turnbull, UK-Ireland: 235.67 points
4. Johann Gustavsson, Sweden: 235.67 points
5. Jared Abrogena, Western Chapter USA: 210 points

20110725-023214.jpg

Joe steps into the Masters.