Hello Richard, I looked online and came up with real quick answers to your problems. You know a lever would have to be awful long to be able to lift that height.
On the first web page is a Rigging supply. You could use a chain hoist like the ones they sell. You could rent that equipment or fabricate it yourself with pulleys and chain hoists.
The 2nd web page is the actual "fulcrum formula" I just looked up fulcrums and lifts...... Material lifting (building construction) Forklifts....... Cranes....... I have used cranes and if a person is set up, many loads can be lifted at a decent price. john
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This lever calculator will determine the force required for equilibrium with the known forces and length.
F x L = W x X
or
F = (W x X)/L
lever1.gif (1928 bytes)
Inputs:
(W) Total Load (lbs/kg)
=
(L) Length from Fulcrum (in/mm)
=
(X) Length to Fulcrum (in/mm)
=
How Much Force is Required?:
By a lifting system, I mean one in which an arm is mounted upon a stand and counterweights allow the simple movement to make it rise in a circular motion.
What I'm looking to do is lift up to perhaps a thousand pounds of wood up to 40 feet high. I just want to know if there are any web sites which discuss the math behind this.
Somebody once said, "Give me the proper fulcrum and I'll move a mountain!" Or something to that effect.