[TowerTalk] Fwd: Aluminum towers -- can you really "walk one up"?

[Patrick Greenlee]

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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