Showing posts with label Mini MA. Show all posts
Showing posts with label Mini MA. Show all posts

Sunday, 4 May 2014

Rigging kits

This is my current set up in terms of rigging gear that I take out on my own private jobs. 


I've talked about these petzl bags before, still can't say enough good things about them.


First up in the large (35lt) bag I have 60m of 16mm Sirius Bull rope and a 4m long 16mm dead eye sling with a small ISC cast pulley attached, this kit only comes out on big jobs or if I don't know the job (i.e.  freelancing) then I may chuck it in as well. 


Then in the first small (25lt) bag I have a selection of things; 30m 14mm sirius bull rope, 5 m dead eye, small ISC portawrap, small woopie sling, large woopie sling,  Medium ISC swing cheek lowering pulley with steel dmm crab,  2m split tail, large loopie sling, x2 petzl tandem pulleys, another smaller woopie (orange) , small mallion, small rigging plate,  2m tape sling and crab, 10m length of xtc line, couple of lengths of hitch cord. 

The idea with this bag was to have everything I'd need for small/medium scale lowering, as well as all the other trinkets you occasionally need for complicated lowering jobs. The 30m rope is usually sufficient for most small trees and also comes in handy as a second line if using the bigger rope. 


Then in the other small bag are some other bits that go out with me on almost every job now. From left to right: in the black bag is the Mini MA system, 22m of 12mm sirius bull rope (tag line), 5m multi sling, 4.5m dead eye, rigging gloves, and big shot/trigger set up 

The tag line has come in handy on numerous occasions, especially on those jobs where I've been told there is no rigging to do and then discover that there definitely is!


I'm pretty happy with my current set up, It covers me for a large range of rigging scenarios, the only major thing I need now is a decent bollard, something like the Stein RC3001 that I get to use for my current main employer 

Tuesday, 15 April 2014

Lots of rigging

Couple of videos here of the Stein Block and Husky top handle  in action, whilst taking down a couple of big poplars.

Nicely overhanging some fences and industrial units, pretty much everything had to be rigged.


                                          

Ended up having a tag line on most of the pieces in order to pull them clear, even had to use the Mini MA system I've been harping on about so much. Came in very handy for a lot of the lower growth that actually dipped down lower than the fences, allowed us to pretension the line much more than usual and in a couple of case lift the pieces up completely with the felling cut on top of the branch. 


You can just see the fence in this photo, with that razor wire type top it was definitely something we didn't want branches getting caught up in. 




Sunday, 6 April 2014

Pulling over a stem/mini MA in action - video

Quick video of the big poplar stem being pulled over with the aid of the Mini MA






The video better illustrates the size and weight of this stem, which standing perfectly upright would have taken a lot of pulling/wedging to get over without the aid of mechanical advantage 

Monday, 24 March 2014

Pulling over a stem/mini MA system in action

Couple of pictures of my Mini MA system in action this week pulling over a large diameter stem from a big poplar fell


3:1 below on the ISC and the mini MA on top on the pinto

Not abundantly clear from the pictures but basically I set up a standard 3:1 MA on the rigging line using a large lowering block anchored to the cherry tree, this then went back to a Pinto rig attached to the rigging line via a 14mm sirius split tail blake hitched to the line. I then attached My mini MA to the pulling end of this line. This basically meant I had a 3:1 advantage pulling on a 3:1 system, now I'm not sure what this means mathematically speaking (maybe 7:1?) but all I do know is the two guys pulling the stem over had no trouble at all.


I'm sure this is nothing new to a lot of you and setting up mechanical advantage to pull a stem over is fairly standard practice. However I know in the past setting up anything more than a 3:1 just with a rigging line and pulleys uses up a lot of rope very quickly, even with a 60m rope you quite quickly run out of rope unless your anchor is very close to the tree your pulling over.

So by being able to use the Mini MA system on the end of the rigging line this issue was negated as well as considerably cuting down on the setup time. 

I have a video of the stem coming down I will upload at some point.