In a flood-prone area designated as Zone AE with a base flood elevation of 12 feet, FEMA requires the lowest floor of new construction to be at what minimum elevation?
Correct Answer
B) 13 feet (1 foot above BFE)
FEMA and most local floodplain ordinances require new construction to have the lowest floor at least one foot above the base flood elevation for safety margin and insurance compliance.
Why This Is the Correct Answer
FEMA requires new construction in flood zones to have the lowest floor elevated at least one foot above the Base Flood Elevation (BFE) as a safety margin. This requirement provides protection against uncertainties in flood predictions and ensures compliance with the National Flood Insurance Program. The one-foot freeboard is the standard minimum requirement for residential construction in Zone AE areas. Building at exactly the BFE would not provide adequate protection and could result in flood damage and insurance issues.
Why the Other Options Are Wrong
Option A: 12 feet (at base flood elevation)
Building at exactly the base flood elevation (12 feet) does not provide any safety margin and fails to meet FEMA's minimum freeboard requirements, which could result in flood damage and insurance complications.
Option C: 14 feet (2 feet above BFE)
While 2 feet above BFE (14 feet) would provide additional protection, it exceeds FEMA's minimum requirement and is not the standard requirement for Zone AE areas.
Option D: 15 feet (3 feet above BFE)
Three feet above BFE (15 feet) is excessive for the minimum requirement and would unnecessarily increase construction costs while exceeding FEMA's standard freeboard requirement.
Memory Technique
Think 'BFE Plus One to Get it Done' - you always need at least one foot above the base flood elevation to meet FEMA requirements.
Reference Hint
Florida Building Code Chapter 15 - Referenced Standards, Section on Flood Resistant Construction, or ASCE 24 Flood Resistant Design and Construction
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