On 8 Mar 2005 07:55:45 -0800, in a place far, far away, "Jon S.
Berndt" made the phosphor on my monitor glow in such
a way as to indicate that:

Has an STS SRB ever failed (in flight or in test) "catastrophically"?

Depends on how you define it. Certainly the SRB failure with
Challenger had a catastrophic result, regardless of how "catastrophic"
a failure it was.

For the STS SRB, human rating _was_ designed in.

Not really. More like waivered away.

Again, no one really knows what "human rating" means. I wish that we
could purge the phrase from our vocabulary.