[TheForge] work hardening question

[theforge@mailman.qth.net]

hello;

this question occurred to me this past saturday and again yesterday
while watching the antenna tower by the house sway back and forth in
the wind.

i may be overlooking something rather simple but here is the question.

what keeps the metal in antenna towers, street light poles, even the
sears building in chicago from work hardening after all the time of
swaying from wind?

it would appear that after swaying back and forth over the years
that the metal would be work hardened and become brittle.

-- 
Terry L. Ridder
Blue Danube Artistic Forge (Blaue Donau Kunstschmiede)
"We do not bend metal, we sculpt it."

digging deep, i feel my conscience burn
i need to know who and what i am
this hunger jolts me from complacency
rocks me, makes me meet myself
----kendall payne---closer to myself---