The 6-page CodeMaster contains everything you need to know to determine rain loads in accordance with the 2018 IBC, 2021 IBC, and ASCE 7-16. This handy laminated guide provides a clear and concise 7-step procedure explaining how to determine the rain load on a roof. A table is provided at the beginning of the document summarizing the rain load variables, notations, and units to ensure that the designer can easily refer back to them for better understanding. Illustrations are provided to explain the key concepts and five "Secrets of the CodeMaster" are included to help the designer avoid making costly mistakes. Additionally, four examples are also included, as referring to them can be beneficial to the designers.