Here's a link all might enjoy..!!
http://home.earthlink.net/~dectiri/OuterSpace/CulvrtHs.htm also,,, I'm comparing a Q type steel bldg and putting it underground partially or whole,, or a container home (underground) built with 2 or 3 and a porch added to it, or just burying my RV and adding on an underground addtion.. I don't need much space but i want it tornado resistant here in Tennessee!!!
