Buildings in coastal high-hazard areas must be supported by what?

Buildings in coastal high-hazard areas must be supported by pilings or columns due to the specific challenges posed by such environments, including the risk of flooding, erosion, and storm surges. Pilings or columns elevate the structure above potential floodwaters and offer additional stability against strong winds and wave action, which are common in these regions. This type of foundation allows for better drainage and minimizes damage during extreme weather events.

In contrast, foundation walls may not provide adequate elevation and resilience against flooding. Concrete blocks and steel beams can be used in various construction applications, but they do not address the particular needs of coastal areas as effectively as pilings or columns. Therefore, using pilings or columns is crucial for ensuring the safety and longevity of buildings in coastal high-hazard zones.