On 4/17/2011 5:47 PM, Kevin Normoyle wrote:
> With a small 52' crankup, you can probably live with quite a bit of lean.
> The main problem is whether it can still go up and down without binding.
>
> The additional stress on the tower from leaning a little, is minor compared to
> the design target wind load.
>
> 20" of lean at the top (60' with mast) would translate to 1" of lean at the
> base
> between the ends of a 3' level.
>
> How much lean do you have at the base (with a 3' level or ??)
>
> Since the lean is linear from bottom to top, the additional friction at the
> two
> overlapped tower section joints shouldn't be so bad...i.e. the bottom joint is
> only seeing like 2/3 of the total lean.
The lean is linear, the force/leverage is not. OTOH for that small a
lean I doubt it'd cause much of a problem from sections sliding.
73
Roger (K8RI)
> if the lean at the top is more than 20" now, after fixing it once..you
> probably
> have some serious problem that shouldn't be jury rigged? Is it on top of a
> spring?
>
> -kevin
> ad6z
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