Fred Webster Associates provides structural analysis and design, plan review, and structural observation services to property owners, architects, contractors and building officials. Fred Webster Associates is one of the few consulting companies that can provide structural design for modern earthen structures, such as adobe, rammed earth, and pressed block, to meet the stringent seismic requirements of California. The design and construction of earthen buildings are unique. Methodologies that are appropriate for other building materials are often not appropriate for earthen building systems. Based on research, testing programs, and field observations, Fred Webster Associates engineers understand the seismic response of earthen materials and have successfully designed both industrial and residential structures in California and Latin America.