Coastal and Floodplain Construction Inspector's Practice Exam

In Coastal and Floodplain Construction, the Bottom Finished Elevation (BFE) refers to the lowest point at which floodwaters are anticipated to rise. To properly design structures in these areas, there are specific regulations regarding the percentage of the lattice or skirting used beneath a building. The correct answer indicates that at least 40% of the area of the lattice must remain open.

This requirement is significant as it helps reduce water pressure against the foundation during flood events, allowing for the free flow of floodwaters underneath the structure. If a higher percentage of the lattice is allowed to remain closed, it may create a barrier that could lead to structural damage due to water buildup.

Regulations are thus put in place to ensure a certain level of permeability to mitigate flood risks effectively. Maintaining at least the specified percentage of openness is essential for the overall safety and structural integrity of buildings located in flood zones.