What is the eternal enemy that affects every building at all times?

Gravity is indeed considered the eternal enemy that affects every building at all times because it is a constant force acting on every structure. Every building is designed to withstand the downward pull of gravity, which exerts pressure on all parts of the structure, from the foundation to the roof. This force is crucial in the engineering and design of buildings; it determines the load-bearing requirements and influences the materials and techniques used in construction. Over time, structural elements can weaken under the relentless influence of gravity, leading to issues such as sagging floors or even collapse if adequate measures are not taken. Understanding gravity's omnipresence is critical for professionals in the fire service and construction as they assess structural integrity and risks during emergencies.