mike@rfiservices.com wrote:
> The porcelain problem is caused by the expansion and contraction of the steel
> inside the porcelain. When it contracts their is a void between the steel and
> porcelain. When it expands the porcelain is forced by the steel to expand and
> can't.
> This type of situation has exsisted for years when using aluminum/porcelain
> insulators. The problem is enhanced by the aluminum because aluminum is more
> suseptable to expansion and contraction.
> Also, the polymer insulators are actually fiberglass inside. The polymer is
> the outer shell and is formed to increase the surface area and distance from
> end to end.
Why did they not put a flexible liner between the two?
We have a similar problem n our new steel-shell home.
I am sitting here listening listening to creaking, cracking,
and grinding.
The problem is that the builders failed to consider that
drywall expands and contracts at a different rate than
the steel roof panels -- so when the sun comes out the
two separate as much as 1/8" !
Doesn't anyone think about the real-world environmental
operating conditions prior to designing insulators or
building houses? Sigh.
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Can we all just help the hurting and save the criticism?
List of Organizations who are HELPING Katrina's Victims:
http://www.bibleseven.com/em.html
Thanks! & 73, doc kd4e
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KD4E =========================================
West Central Florida
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