In what scenario might structural observation NOT be required?

Structural observation may not be required for low-rise buildings under three stories primarily due to the lower level of risk and complexity associated with these structures. In many building codes and regulatory frameworks, low-rise buildings are often subjected to less stringent requirements because they present a lower potential for catastrophic failure compared to taller or more complex buildings.

For example, buildings in high seismic zones or those classified under risk category IV typically have higher levels of scrutiny due to the potential for significant structural impact during seismic events or because they serve essential functions that require robust safety measures. Similarly, buildings located in coastal areas may face additional challenges, such as wind loads and flooding risks, which necessitate thorough structural reviews.

Consequently, while structural observation is critical for ensuring the safety and integrity of buildings subject to higher risks or more complex engineering demands, it is often deemed unnecessary for simpler, low-rise buildings that do not present as high a risk to public safety or structural integrity.