[UK-CONTEST] Mastrant ropes - Caution?

[G3RAU at aol.com]

In a message dated 26/09/2012 09:17:14 GMT Daylight Time, k.kerr at abdn.ac.uk 
 writes:

I  genuinely believe that the installation was otherwise well enough 
designed and  assembled (but then I would say that, wouldn't  I!)





Sorry to hear that tale Keith, it sounds very nasty.  
I would be interested in the post mortem analysis, having had a similar  
incident - but not with Mastrant.
What was the exact guying radius?
Which sections of the Versatower were guyed?, and was it with  3 guys on a 
tier ? 
Did the ground anchor perhaps move under extreme load?
What was the length of the stub mast above the top of the head unit?
What type, and how many, beams?  and how far was each up the stub  mast?
When you installed it was the top guy slack enough to enable the mast  to 
move, or was it very tight? In other words could you set it rocking by  
heaving the top guy up and down and setting up a rocking motion?
Can you find out or estimate the likely max wind gust  it encountered?  Say 
if that is the standard reporting height of  11M or up at beam height.
 
I hope you manage to get it all down safely, just remember the lifting  
cables may well have been stressed near to death, so be very careful and don't  
put your body weight onto the upper sections by climbing. You may be the 
final  straw ! Likewise luffing over with the bent section as it is, the 
luffing cable  may become quite stressed under the excess load!
 
73
Derek G3RAU