Conservation of our existing structures has obvious economic and social value. Moreover, historic structures provide and excellent laboratory for studying aspects of structural engineering, materials science, forensic engineering, and building design. This text provides a practical guide for consulting structural engineers and others on dealing with issues unique to historic structures. Emphasizing structural evaluation and condition assessment based on sound preservation philosophy, but without burdening the reader with tedious calculations, the book discusses the role of the structural engineer in the evaluation and preservation process and discusses such topics as structural safety, analysis, and conservation.