To: carranza2 who wrote (131609 ) 5/6/2004 12:50:42 AM From: Bilow Read Replies (1) | Respond to of 281500 Hi carranza2; Re: "During pre-trial testimony of the contractor who built the columns, we learned for the first time that the top supports of the columns into which load-bearing beams were to be installed were put in backwards by the contractor, destroying the engineer's design intent. No one, unbelievably, caught this error. All of a sudden, my client is innocent, the contractor is in the soup, and the guns train on him instead of on the engineer. " Probably because of the devastating nature of its mistakes, the military lives with a higher standard level for those in command. The basic principle is that those in command are generally responsible for the actions of those they command. There is a similar principle in engineering, and in any good company, probably. When a disaster occurs, after the "sinner seeking" has run its course, all should consider what they could have done that would have avoided the disaster. This is best done without the lawyers present. In the case of the backwards installed load bearing beams, the engineer could have done a number of things that would have reduced the probability of this particular error, such as: (a) not using components that are easily confused, (b) adding notes that indicate that they must be installed carefully, (c) providing for a test plan to measure the structure's resistance to failure, (d) writing an inspection plan for this sort of eventuality, (e) actually inspecting the building as it was being built, (f) adding fabrication holes in the component so that they cannot be installed upside down, etc. It usually takes a lot of people to make a disaster. The lawyers find a "black and white" case against some culprit, but it's not always the right one. Most real world situations are more grey than that. An engineering plan is not really enough to make a product. One also needs to take into account the capabilities of the people who will be doing the assembling. Undoubtedly a better contractor could have seen the error and avoided it. But a better engineer could have made a design that would be safe for a mediocre contractor to build. This principle, that critical engineering designs should be set up so that they only go together one way, is the only reason I am willing to fly in commercial aircraft. -- Carl