Say what? If the tower were not tapered (lets look at a simple model)
and you picked up the top then you would support 1/2 the weight and the
ground via the hinges would be holding the other half of the weight. The
higher the top of the tower goes the greater the portion of the weight
is held by the ground/hinges until when vertical the ground holds all
the weight.
Buy a 16 ft 2x4 and either notch one end and apply duct tape to secure
it to about 16 ft above the tower base or otherwise secure it with wire
or...
Then as you lift the tower the 2x4 can take the load while you rest,
change hands, take a break or ... Once the tower is lifted so high the
2x4 is not securing the tower very well grab hold of the 2x4 and use it
to push on the tower. The increased leverage pushing at the 16 ft level
rather than at your head height or so will make a considerably easier
time of it.
Archimedes said something like given a lever long enough and a place to
stand he could bend the lever (move the Earth) or some such.
Patrick NJ5G
On 3/8/2015 11:45 PM, Richard (Rick) Karlquist wrote:
On 3/8/2015 5:36 PM, Hans Hammarquist via TowerTalk wrote:
If you don't put to much heavy stuff on the tower before you walk it
up it should be OK. Just for your comparison, I have an 85 feet
aluminum tower and the total weight of the tower, empty is 300 lb.
It's tapered so the heavier section are at the bottom. No, I didn't
walk this tower up but I easily carried around the top 40 feet during
the assembly of the tower and could, probably have raised the by
myself as a 40 foot tower, had I done that.
Hans - N2JFS
I made some calculations and determined that the
force you have to apply to a 40 foot tower of
uniform cross section with nothing on top works
out to 1.7 times the weight of the tower. And
you have to be able to apply this force using
one hand at a time while you "walk". It all
depends on the weight of the tower and the
strength of the walker. Can you hold an 85
pound barbell over head and pass it back and
forth between your hands? Then you can walk
up a 40 foot tower weighing 50 pounds.
Rick N6RK
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