This home fallout shelter is a modified version of version of FEMA’s Plan A. They are both basement shelters build of reinforced masonry, and both take a single person about two days to build.
The biggest difference between this fallout shelter and plan A is the type of bricks.
the first plan uses several types of block, whereas plan b uses 2 1/4 x 4 x 8 brick (and a lot of them – over 2500).
Using smaller brick, but more of them this plan is easier for a smaller statured person to build, your not throwing hundreds of large cinder blocks overhead.
One thing to not that for both plans, the materials list and diagrams are for roof shelter only because it assumes your building in a underground basement.
If you need walls, then that will add to both your material list and the time needs to build your shelter.
If I were to build my own fallout shelter I am think this is a good place to start, but personally I would look at my building codes as well as get the advice of a structural engineer – as I would not want to be buried under 2500 bricks.H-12-B Home Fallout Shelter Modified Ceiling Shelter Basement Plan B