[Thedragon]

Some of us may have these in our preps or maybe considering adding to their preps.

They are very usefull for lifting or moving heavy objects horizontally, vertically or both via a gantry type system.

Here are some info links on configurations, using basic physics to use them efficiently and safely.

Caution is also required for the lifting specifications of the equipment including the specs of rope, chain, steel rope and anchor points.

Basic information by 'IAC Lesson Plan'
http://www.swe.org/iac/lp/pulley_02.html

An interactive diagram for calculating the configuration of pulleys for specified loads by ' ThinkQuest'.
http://library.thinkquest.org/27948/pulley.html

A simplified configuration diagram by 'Howstuffworks'.
http://www.howstuffworks.com/pulley.htm

The physics of blocks and pulleys by the 'University of New south Wales, Sydney, Australia'.
http://www.phys.unsw.edu.au/~jw/blocks.html

 

[redice]

A year or so ago I tried to find some block and tackle pulleys etc and no where I looked sold them, I ended up buying a cheep chain hoist for what I wanted to do and it works great however I still plan on picking some up and just recently found someone who actually carries them. Northern tool was in my local store getting something else and here on an endcap was a treasure trove of pulleys. They have them on there website it looks like now to, look under pulleys and blocks should come up Of course the hard part still is finding decent rope most rope sold in stores isn't rated for the load that these can take.

I would greatly appreciate it if anyone else knows of good places to find them, highter the tonnage rating the better just looking for rope ones though don't wanna mess with cable at all.

On tv I saw some marines pull a bottomed out Hummer out of where it was stuck with just rope block and tackles and a whole bunch of guys.

 

[birdman]

...I would greatly appreciate it if anyone else knows of good places to find them, highter the tonnage rating the better just looking for rope ones though don't wanna mess with cable at all...

Search under scaffolding or "boatswain's chair" as the window washer guys have to have some pretty stout rope to swing out over the edge of a highrise (an almost son-in-law does storm shutters & occasionally uses a boatswain's chair...)

Allan