In Part 2 of our ‘Back to Basics’ series, we will be discussing the second basic component of physics used to analyze a structure: Equilibrium.

In structural engineering, equilibrium is typically well defined in terms of specific equations, however, the third law of Newton’s physics is sufficient to explain the goal of most building structural engineering problems. “For every action (force) in nature there is an equal and opposite reaction.” Structural engineers need to find solutions to problems (forces) so there will always be a constant opposite reaction to keep a structure at-rest. This is known as static equilibrium. Engineers are always questioning the reliability of a structure’s support to act in a permanently static condition with regards to the overall stability of the structure and the user tolerance to perceived movement.

We will be discussing the third and final component, Compatibility, later this week.