A building deemed unsafe for occupancy by a government authority is typically marked with a placard of a designated color, often red. This designation indicates significant structural damage, hazardous conditions such as fire or earthquake damage, or violations of habitability standards. For example, a structure compromised by flooding might receive such a designation due to the potential for mold growth and structural instability. This visual indicator serves as a warning to the public and restricts access.
Placing such a designation on a structure safeguards public safety by preventing entry into potentially dangerous environments. This process allows authorities to control and mitigate risks, protecting individuals from harm and further property damage. Historically, these systems have evolved alongside building codes and disaster response protocols, refining methods for evaluating and addressing structural safety concerns following major events or during routine inspections. The practice contributes to community resilience and aids in post-disaster recovery by prioritizing safe reconstruction.