[TowerTalk] engineering help? Antenna weight for US Tower TX472

[kr2q at optimum.net]

Hi all,

http://www.ustower.com/wp-content/uploads/2014/05/TX-472.pdf

I am wondering about the spec for 200 pounds of antenna weight.  Can someone with some
engineering background/experience please review the above link and let me know:

1.  Is there a "safety factor" on the 200 pounds?  If so, what is it?

2.  What point is the weak link for the 200 pounds?

RSVP

Thanks!!
de Doug KR2Q