This engineering analysis is a compilation of studies and calculations conducted between 1990 and 1993 by Thomas E. Griepentrog, P.E. of Buckhorn Geotech, Consulting Engineers and Geologists of Montrose, Colorado and Kenneth D. DeLapp of DeLapp Engineering in Santa Fe, New Mexico. This report is a thorough analysis of all structural aspects of the Earthrammed Tire Walls of the Earthship design by Architect Michael Reynolds. This book also includes relevant parts (specific to Earthships) of a F.E.M.A. (Federal Emergency Management Agency) evaluation that researches many types of alternative building.