A code of ethics is a set of guidelines which are designed to set out acceptable behaviors for members of a particular group, association, or profession. Many organizations govern themselves with such a code, especially when they handle sensitive issues like investments, health care, or interactions with other cultures. In addition to setting a professional standard, a code of ethics can also increase confidence in an organization by showing outsiders that members of the organization are committed to following basic ethical guidelines in the course of doing their work.
The following govern the professional practice of Civil Engineers:
These ebooks will provide a good place to start if you are exploring engineering ethics or developing a more nuanced understanding of the concepts.
Engineering Your Future by 
Engineering Ethics by The following organizations have collected libraries of case studies illustrating professional ethics:
