This commentary presents the standard text of EC 3 Part 1-1 along with its national annex in a practical manner and summarizes it into a coherent text. The specific German rules and additions are explained in relation to the European text. The explanations and comments assist the reader in quickly familiarizing themselves with the EC3 regulations and applying them confidently in practice. The work is supplemented by a series of examples. The texts are printed in the following order: standard text with incorporated A1 amendments from 2014 and national annex, commentary on the individual chapters of the standard, example calculations.