If you are familiar with the ZetaTalk trench shelter, please read this first blog as it talks about the deficiencies inherent in that design.
https://earthchanges.ning.com/profiles/blogs/zt-analysis-are-trench.
These next blogs are culminations of group efforts and cover as many scenarios as we could think of and modifications that could make the shallow trench shelter a more secure shelter.
A Plastic Tunnel -- A Way To Avoid Electrocution by Ground Electricity
earthchanges.ning.com/profiles/blogs/ideas-for-bunkers-a-plastic-tunnel-portable-ideal-for-those-who
Another Idea For A Trench Shelter
https://earthchanges.ning.com/profiles/blogs/another-idea-for-a-trench
The issue of radiation (solar or nuclear) was raised and this blog talks about it and how to protect yourself:
Yet More About The Inadequacies Of Shallow Trench Shelters
https://earthchanges.ning.com/profiles/blogs/zetatalk-yet-more-about-the-inadequacies-of-shallow-trench
This was my original version of a enhanced shallow trench shelter, with a ferro-cement dome:
My Idea Of A Trench Shelter
https://earthchanges.ning.com/group/survivalinformation/forum/topics/my-idea-of-a-trench-shelter
(Sorry, the link to the sunlife site still works but the information is no longer available. You can look around for another site with plans to build a ROUND dome--don't go geodesic, it is reported there are high divorce rates associated with it, thus it seems to amplify bad vibes.)
Other options:
Mini blast & fallout shelter-good for tornadoes, storage, etc.
https://earthchanges.ning.com/profiles/blogs/mini-blast-amp-fallout
Earthbag Structures
https://earthchanges.ning.com/profiles/blogs/shelters-earthbags
Resistant to earthquakes, flooding, severe weather
Ferro-Cement Structures
https://earthchanges.ning.com/profiles/blogs/ferrocement-shelters-amp-boats
Extremely strong.
DuPont's Kevlar Bunkers
https://earthchanges.ning.com/profiles/blogs/duponts-kevlar-bunkers-offer
Tornado Safe Room
https://earthchanges.ning.com/profiles/blogs/tornado-safe-room
Pet Shelters
https://earthchanges.ning.com/profiles/blogs/pet-shelters-the-1000-year
Mini Noah's Ark Shelters
http://www.cbc.ca/news/world/story/2011/09/30/noah-ark-japan-tsunami.html
https://earthchanges.ning.com/profiles/blogs/tsunami-fears-fuel-sale-of-mini-noah-s-arks
