[BC] Clevis photo

[Broadcast List USER]

Though it may APPEAR the insulators in question are in tension, they  
are, in fact, in compression as a result of the way they are  
constructed.

The insulators are NOT the weak part of the design.

Look at the stresses placed on similar insulators on high Voltage  
transmission lines.  They have much more complex forces placed upon  
them.  Imagine the weight of all that wire!

Of course, it does appear to be a really strange design.

Regarding the Clevis, they are supposed to be that way.  The forces  
are MUCH less than if the bolt was straight.  Remember your Statics  
class, freshman year?

--chip

On Oct 28, 2009, at 7:37 PM, broadcast-request at radiolists.net wrote:

> Message: 2
> From: Mike McCarthy <towers at mre.com>
>
> Carl,
>
> This station, owned by an Ivy League school is a negligance lawsuit
> waiting to happen.  For an institution of such esteemed higher  
> education,
> this is a text book example of abject neglect compounded by absolute  
> civil
> engineering incompetence. I'm amazed this tower is still standing.
>
> The failure of the insulator in that mode is common.
>
> MM