PROCEDURE
A cross brace structure was constructed from plasticine and bamboo skewers. It was in the shape of either a cube or a rectangular prism depending on the building height to be tested. The cross brace structure was placed inside the buildings to be tested to see if it would stabilize the building. Cubic, overlapped buildings of three, six and nine layers of blocks were tested. The handles of the earthquake machine were pulled back to the line then let go. When the machine had stopped shaking, the handles were pulled again and again until the building collapsed. Each pull of the machine was timed to last two seconds. Three trials were done. At the end of each trial, the building was rebuilt. The data for each trial was recorded.
 Rectangular cross brace
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 Nine layer building cross braced |
