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Figure 3. Structural support for the roof and ceiling of an ECHO earthbag house in Thailand (A) and Florida (B). In Thailand (A), a plywood ceiling rests on metal bars welded to rebar pylons (an example of one is indicated by the red arrow) hammered into the top of the earthen wall. In Florida (B), wooden joists rest on plywood (indicated by red arrows) inserted between two bags. Source: ECHO Asia staff (A) and Tim Motis (B).