It is interesting to note that the Glen Martin aluminum towers do not
use welds but instead use a bazillion fasteners. They have their
own issues, but I suspect they are more amenable to a reliable
solution than dicey welding.
> I have no first-hand knowledge of these towers, but I am currently
> working with an experienced aluminum welder (military aircraft) on a tower
> project. Presuming arguendo this is not a "buttering" problem (cold weld
> with no penetration) it sounds as if the completed units are not
> heat-treated to bring them back to the original tensile strength.
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