If you spend enough time you can find almost anything now for free on the Internet. Jason has been sending me one good tip after another. He recommended Strawworks.com in the UK for their detail drawings. They’re world famous for their expertise in strawbale building. Visit their site to see their code approved rammed tire foundation detail drawing and other excellent drawings, photos and more. Note: I still prefer gravel bag foundations for their speed and ease of construction, however, it can be challenging getting them permitted in areas with building codes.