The project engineer was a man named Duncan. Gillum and Duncan were charged with gross negligence by the licensing board and their licences were revoked even though criminal charges had not been filed against them. Gillum's defense was that he signed off on the plans without looking at them and that this was common practice.
Professional ethics is different from personal morality.
Tacoma Narrows Bridge story movie Florman claims that engineers don't need codes of ethics any more. But this isn't a special dilemma for engineers. You may decide on the basis of personal ethics that you don't want to design a gambling casino, but that isn't a matter of professional ethics. If we think cigarettes should be banned we should work for that as a government decision, not call on individuals to not design cigarette manufacturing machines or sell cigarettes. Such action is appropriate as a citizen.