A load combination is a prescribed way to consider more than one type of structural load at the same time. It may pair permanent weight with occupancy, wind, or seismic effects. The combinations and factors come from applicable design criteria and codes. Engineers select the combinations that fit the structure and project requirements.
Why it matters for owners
Combinations affect analysis scope and design decisions. A project team should document its governing criteria so proposals, reviews, and later changes use a consistent basis.
