This IAEA Training Course Series publication contains guidelines on a range of non-destructive testing (NDT) techniques applied to the assessment of civil engineering structures. With contributions from renowned experts in the emerging field of NDT for civil structures assessment, this publication provides clear and comprehensive instructions on 20 NDT methods broadly grouped under mechanical, electrical and magnetic, acoustics and radiation methods. It has been developed as a reference for NDT trainers, training organizations, and certification bodies, detailing the subject matter and the content for each level of certification.