Who's at fault for the death of Nodar Khokhobashvili?

I think the people that built the luge track should have taken the possibility from being flung from the track at 100 mph into account during design and that steel columns like what he hit should not have been left exposed.

Physicists or engineers, do you think he would have survived if the track wall had been extended further up such that he would have bounced back and forth between the track walls instead of being thrown into the column? Judging by common sense I think this would be possible. Human error may have caused him to come out of the last turn in a less than ideal manner, but he shouldn’t have died for this minute miscalculation.