The failure points were the same: walls and slabs not tied properly into columns -- that's a roof slab hanging off the building -- cantilevered structures, or structures that were asymmetric, that shook violently and came down, poor building materials, not enough concrete, not enough compression in the blocks, rebar that was smooth, rebar that was exposed to the weather and had rusted away.
Os pontos de falha eram os mesmos -- Paredes e andares mal presos às colunas -- este é a laje de um andar pendurada no prédio -- estruturas balançando, ou estruturas assimétricas, que balançaram até cair, material ruim, concreto insuficiente, compressão errada nos blocos, vigas que eram lisas, vigas que foram expostas à umidade e enferrujaram.