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Disaster Resistant Hemispheric Dome — 7 Comments

  1. This hemispheric dome was primarily designed for extremely high risk of earthquakes. The group I was working with wanted something that could withstand the worst possible scenario. A hemispheric dome like the one shown above is the ideal shape for earthquake resistance.

    It’s also great for resisting hurricane and tornadoes, although you’re not limited to hemispheric domes for these situations. You could use lots of other dome shapes if you’re not in a high risk seismic zone. Something like the Peace Dome would be fine in hurricane and tornado areas, as long as you do a good job on the plaster. http://earthbagplans.wordpress.com/2010/10/10/earthbag-peace-dome-2/

  2. I am sorry I missed it in your comment, I was studying the drawings both below and the one included in the link above. Both seem to indicate a slab poured separate from the footing. There was no steel connection between the two.

    A few more questions:

    Do you have a conceptual drawing of the steel frame or shell?

    Was there a reason there was no wire mesh in the slab?

    For a full floating effect in an earthquake, what do you think of having rubble/gravel under the entire structure? Sort of like ball bearing.

    Thanks

  3. I was studying the cross section in the earlier post and I am a bit confused. It looks as if the slab and the walls are separate. Also it looks as if you have concrete between the rubble and the pumic-crete. Wouldn’t it be structurally stronger to have the foundation and the slab poured as one monolithic pour with rebar tying the concrete part of the foundation to the walls? Just trying to understand the principle and design.
    Thanks.

    • That previous drawing was from a different project. I used it to show the general idea of pumicecrete inside double ferrocement shells. And in this blog post I explain how it’s best to tie the slab to the walls.

  4. Hi Owen
    Could you post up a cross section of the integrated slab & dome on a rubble foundation? Would the slab/dome just straddle the rubble trench? Or would the dome and slab actually continue into the trench like a concrete footing? I am trying to visualize.
    Thanks

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