Francisco Arriaga is a Professor at the Technical University of Madrid (Universidad Politécnica de Madrid – UPM) in Spain. He teaches structural design courses at the School of Forestry Engineering and Natural Resources and coordinates the Timber Construction Research Group at UPM. His research is focused on the structural use of timber products and nondestructive testing and evaluation methods for wood materials and structures. He has worked on several structure inspection projects, mostly in historic timber buildings. He is also involved in timber products standardization and design codes for timber structures at the national standardization body and European committees. He is the author or co-author of numerous technical reports, articles, and books focused on timber structural design. Francisco holds an MS degree in Architecture (1981) and a Ph.D. (1987) from the Technical University of Madrid.