PROCEDURE
A roof was stuck to the top of cubic, overlapped buildings of three, six and nine layers of blocks using plasticine. The buildings were tested for increased stability. 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.
 Three layer overlapping building with roof |
 Six layer overlapping building with roof |
 Nine layer overlapping building with roof |
