Your looking at the construction process of a storm shelter. This roof has rebar that will support the concrete that will be 10 inches deep and the block wall have pea gravel poured into each section with rebar down the blocks.
We build safe safe rooms.
Let us look at your need and design with our engineers a safe room that works for your need. Each space and requirement is different but safety is not.
Give us a call and lets look at what your need is and how we might be able to assist.