The company I work that builds FEMA 361 Safe Rooms. Since we are in a serious seismic zone (New Madrid) the seismic reactions overrule the tornadic reactions. They are all built with prestressed concrete.
The company that I work for builds FEMA 361 Safe Rooms. Since we are in a serious seismic zone (New Madrid) the seismic reactions overrule the tornadic reactions. They are all built with prestressed concrete.
Well I sort of trust wood more than anything else, due to its flexibility. I’m no engineer but I suppose the Roman Coliseum has stood for something like 2,000 years. Most of it, anyway. It was the Romans who popularized concrete, btw.