三角形の形状は、ねじれに対する抵抗が増加するため、しばしば深刻な地震の間に大きな損傷の原因をもたらすため、長方形よりも地震中に揺れが少なくなります。
Triangular shapes will cause them to sway less during an earthquake than a rectangular because they offer increased resistance to twisting--often the cause of major damage during a severe earthquake.