A standard, foundational case study for beam deflection is the Simply Supported Beam with a Concentrated Load. This case is frequently used because it clearly demonstrates maximum deflection at the center, is easy to visualize, and serves as the basis for superposition methods.
A structural steel beam (I-beam) is used to span a 6-meter opening in a warehouse. A heavy piece of machinery is placed exactly at the center of the beam. As a structural engineer, you need to calculate the maximum deflection to ensure it does not exceed the allowed limit of 15 mm.