Most of us have had the old "can't crack the egg" trick played on them. That and the fact most underground structures are in a rounded shape is the reason we designed our shelters with the dome roof. It's stronger. Same as tunnels, culverts, gasoline storage tanks and such are built. We've even run our backhoe across the top of ours; not even a dent!
Handcrafted quality, Built one at a time. We don't hire extra help during the rush season. That can compromise the product. But, the end result will be worth the wait. Over 900 satisfied customers in 26 States, Since 1999. We must be doing something right.
A shelter isn't a shelter just like a crop duster and a Boeing 767 aren't both just airplanes.