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In my searches on the internet i often stumble across info that is new to me and might be useful to other in the prepping community
One of these such items is the catalan vault
http://en.wikipedia.org/wiki/Catalan_vault
the catalan vault is a really great idea and can be manufactured with limited resources, is very solid and can provide very stong buildings.
http://architecture.mit.edu/class/guastavino/features/ramage/index-ramage.htm#
the tiles used in the vault can be simple clay dried in the sun . and can be stuck together with a simple plaster –
http://www.notechmagazine.com/2011/12/sustainable-urban-dwelling-unit-sudu.html
check out some of these links for more info
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