Abstract Combination between the structural geology and engineering geology is useful to get a wide view to solve problems in rock mechanics. Utility of study the discontinuities and all other geological structures to understand the elastic theory of rock material as well as mass. This report provides and instructions for performing and documenting field work. The applications of geology to solving engineering problems is emphasized, rather than academic or other aspects of geology. The report provides the guidance for geologic classification and description of rock and rock discontinuities. Applications of standard indexes, descriptors, terminology, sampling, testing and performing discontinuity survey.