Hi Steve,
This is a great example of a good question to put to the manufacturer and
apparently you are trying to do just that.
With no more data that you have right now, I would think that the most
important consideration is corrosion between dissimilar metals, especially
corrosion of the tower aluminum where the bolts go through the legs. Minimum
corrosion occurs when the two metals in question are close together on the
table of "galvanic action" you can find in most chemistry textbooks. You
will find aluminum and iron (steel, stainless or otherwise) to not be very
close together. You will find aluminum and zinc to be quite close. Since
the two metal that touch each other will be zinc and aluminum if you use
galvanized bolts, that would be my choice. If you pick aluminum and
stainless steel, the aluminum tends to turn to white powder over time . . .
Stan w7ni@teleport.com
Stephen J McCarthy wrote:
> Tower Guru's:
>
> I am putting together the pieces I need to erect a 50' Universal Towers
> aluminuim tower.
>
> The question is should I use zinc plate steel or stainless steel nuts and
> bolts? Do I need to use washers and what type, or should I use an elastic
> stop nut?
>
> Does anyone know if Universal Towers has a web page or e-mail address?
>
> Thank to all of you ina advance.
>
> 73's
>
> Steve
> W0SJM@amsat.org
>
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