Regarding loads- Yes, Force = Mass x Acceleration, with a differential for time. Back to the no accurate data. How fast can an 13,000# elephant accelerate?
I need to call Rich Purnell in Astrodynamics.
I have the same question from a client. The client was able to show me pictures of a corral under construction. Client thought the fence was 5" Sch. 80 pipe on 24" centers with 2x5 tube at top to keep alignment. Height was 7'.
I considered using a human guardrail as a example and scaling it up...