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Step 7The rigging
To set up the rigging, you run the rope through the following path:
- Big pulley, wheel one
- Small pulley wheel
- Big pulley, wheel two
- Attach to small pulley mounting point
I opted to tie a loop and go through a carbineer for mounting to the first pulley. This way you can unhook it easily if need be.
The loop should be none other than ..... a bowline!
It's the strongest knot PERIOD and does not slip. Very safe, and sailors have been using it for centuries.
Attach the smaller rope to the hole in the smaller pulley. The purpose of this line is to guide the objects away from the side of the house. Since the boom crane only extends four feet, most objects need to be pulled away. It also prevents things from swinging wildly.
So the basic idea is that there will be one (or two) people on the ground that will pull the object up, while one person guides the object. A third person is on the balcony ready to pull anything over the edge of the railing, and safely onto the balcony.
The way the pulley system is rigged up, it results in a divide by four lift advantage to the person on the ground. It does use more rope than a single pulley system, but this way one person can do the lifting if need by. So if the object weighs 100 lbs, you only need to be able to pull 25 lbs.
- Big pulley, wheel one
- Small pulley wheel
- Big pulley, wheel two
- Attach to small pulley mounting point
I opted to tie a loop and go through a carbineer for mounting to the first pulley. This way you can unhook it easily if need be.
The loop should be none other than ..... a bowline!
It's the strongest knot PERIOD and does not slip. Very safe, and sailors have been using it for centuries.
Attach the smaller rope to the hole in the smaller pulley. The purpose of this line is to guide the objects away from the side of the house. Since the boom crane only extends four feet, most objects need to be pulled away. It also prevents things from swinging wildly.
So the basic idea is that there will be one (or two) people on the ground that will pull the object up, while one person guides the object. A third person is on the balcony ready to pull anything over the edge of the railing, and safely onto the balcony.
The way the pulley system is rigged up, it results in a divide by four lift advantage to the person on the ground. It does use more rope than a single pulley system, but this way one person can do the lifting if need by. So if the object weighs 100 lbs, you only need to be able to pull 25 lbs.
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Apr 6, 2008. 4:33 PMcarolw04
says:
Where do you get a pulley like that?? Is there somewhere that isn't online (cuz I need it soon....)?
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Apr 7, 2008. 10:08 AMcaptain Jack (author)
says:
go to eBAY and type in "wooden pulley." I did it just now & there are over 30 results.
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Apr 24, 2007. 2:22 AMlucanos
says:
Whilst a bowline will certainly do the job, a knot which is more widely used with this kind of rope is the Figure of 8. In the case of tying a knot around a fixed anchor (like through a ring or eyelet), a rethreaded figure of 8 can be used - http://www.chockstone.org/TechTips/F8Knots.htm
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