A seismic design category is a classification used by applicable building codes to set seismic design and detailing requirements for a building. It is determined from code-defined factors, including hazard and building characteristics. The category and resulting requirements depend on jurisdiction and project inputs. Licensed professionals determine how current local rules apply to a specific project.
Why it matters for owners
The classification can affect analysis, detailing, coordination, and project effort. It should be confirmed early with the design team.
