Well, we've done it with concrete tents [1]. It seems plausable you could begin with that kind of shelter and use that as a basis for further reinforcement. [

Well, we've done it with concrete tents [1]. It seems plausable you could begin with that kind of shelter and use that as a basis for further reinforcement. [1] https://www.concretecanvas.com/cc-shelters/ https://www.concretecanvas.com/cc-shelters/