<human>:  How does one build a durable suspension bridge?
<bot>: Building a durable suspension bridge requires careful planning and thoughtful execution. The bridge needs to have a strong enough foundation to support the weight of the bridge and anything that might pass over it. This can be achieved by using reinforced concrete and tested steel girders. The bridge also needs to be designed and constructed in a way that supports the weight of the suspension cables. These cables need to be made from high-tensile steel and securely anchored at either end of the bridge. Additionally, regular maintenance and inspections should be practiced to ensure the bridge remains structurally sound.