Flood Resistant Building Codes: IBC, ASCE 24 & ANSI/FM 2510

What Flood-Resistant Building Codes Actually Are

Compare flood-resistant building codes for safe & resilient commercial properties. Nationwide US properties need to meet specific design, construction, and maintenance requirements. These standards are managed by the Federal Emergency Management Agency (FEMA), National Flood Insurance Program (NFIP), as well as local authorities. As a building owner, stay updated with the latest compliance guidelines for natural disaster & emergency management.

Before you schedule an on-site risk assessment, familiarize yourself with the latest International (I-Codes):

• International Building Code (BC / IBC): Baseline for commercial, industrial, and multi-family property design. Establishes key standards for life safety & structural strength.
• Performance Codes (ICC): Sets measurable performance goals for design professionals and engineers.
• Existing Building Code (IEBC): Requirements for repairs, upgrades, additions, and alterations on existing facilities.
• Mechanical Code (IMC): Guidelines for water supply equipment, plumbing utilities, and core control systems. 
• Fire Code (IFC): Specifications covering emergency access, hazardous material management, and fire preparedness.

Read on to learn about installing protection that’s compliant with local, statewide, and federal flood resiliency building codes.

National Flood Insurance Program (NFIP)

Explore up-to-date building codes & standards with the National Flood Insurance Program. The NFIP provides accessible coverage for building owners, businesses, and US communities. Adopt & adhere to local floodplain management regulations with specialized insurance policies in-place. Typically, both building & contents coverage policy options are available for owners. In the event of a severe storm or natural disaster, NFIP policies cover physical losses to infrastructure, assets, and equipment. Before recommending an approach, teams review property value/age, coverage scope, type of industry, and unique site-specific requirements.

Minimum floodplain management standards to qualify for the NFIP program traditionally include:

• Flood Resistant-Construction: Materials & equipment must be flood damage resistant for reliable protection.
• Openings & Enclosures: Subterranean basement spaces need dedicated hydrostatic openings or vents.
• Elevation: The lowest level of your property must be at or above base flood elevation (BFE). This represents the annual 1% change of flooding.
• Anchoring: Your structure needs to be securely constructed to prevent collapse, movement, or floatation during high-water events.
• Local Rules: Many municipalities & cities enforce stricter rules, extra freeboard height, and added BFE requirements.

Speak with mitigation specialists about current NFIP requirements & standards.

ASCE 24 Flood Design Classes

ASCE 24 sets minimum flood resistant design & construction standards for properties in special flood hazard areas. The American Society Of Civil Engineers (ASCE) is an ANSI-accredited SDO. Across the county, ASCE requirements provide technical guidelines that enforce efficiency, dependability, productivity, and safety. These benchmarks are a consistent reference for design professionals, architects, and civil/structural engineers. Access risk-focused needs for coastal, waterfront, and urban properties.

The latest ASCE 24-24 addresses design criteria for foundation construction, elevation, floodproofing strategy, and utility criteria. Recent updates & clarifications include:

• Inspection & Maintenance Requirements For Flood Mitigation Plans
• Flood Hazard Area Extended To The 500-Year Floodplain
• Changes For Alignment With ASCE/SEI 7-22
• Placement Of Automatic Control Valves, Attendant Utilities, & Dedicated Equipment
• Design Class Changes For Hospitals, Ambulatory Care, & Agricultural Operations

Review criteria to achieve and maintain compliance with the American Society of Civil Engineers & Structural Engineering Institute.

ANSI/FM 2510 Testing & Certification Standards

ANSI/FM 2510 remains one of the most well-known flood protection codes, focused on testing & certification standards. This national US standard sets key testing performance requirements for watertight mitigation barriers, designed to protect against coastal/tidal or riverine/flash flooding risks.

As you compare barriers & develop your strategy, review general requirements from the American National Standards Institute (ANSI) & Factory Mutual Global (FM Approvals):

• Barrier Components Must Be Corrosion-Resistant
• Glazing Products Must Be Fabricated With Laminated Glass
• Automatic Barriers Should Be Designed For Debris Resistance & Impacts
• Manually-Operated Mechanisms Need To Have A Locking/Latching Component
• Self-Activating Equipment Needs To Have Manual Deployment Options

Exact requirements depend on your system’s permanent/removable functionality, active/manual operations, or intended applications. Additionally, there are specialized parameters for opening/perimeter barriers, resistant glazing, and flood mitigation pumps. Evaluate testing & certification parameters for flood resilient building codes.

FEMA Special Flood Hazard Areas Codes

FEMA special flood hazard areas (SFHAs) have unique requirements & protocols for compliance. These requirements determine construction restrictions, floodplain management regulations, and policy eligibility.

Start by determining your building’s zone definition & risk classification level:

• A: High-risk zone with no BFE.
• AE: High flood risk area with a documented & established BFE.
• AO: At-risk of shallow, sheet flow flooding.
• AH: Risks associated with shallow pond locations & documented BFE data.
• V: Coastal area with high wave impact risks.
• VE: Similar to Zone V, with a documented hydraulic analysis & base flood elevation.
• X: Outside FEMA’s 1% annual floodplain map. Insurance is recommended but not required.
• D: No analysis performed, but higher risk levels expected. Coverage or protection may be advised.

Whether you’re located in an SFHA or proactively planning for the future, meet with flood control experts to measure your site’s risk. Evaluate zone designation, BFE data, and recommended options. Speak with flood mitigation companies to understand building, testing, inspection, and maintenance codes in FEMA SFHA zones.

British BS 851188 Certification Standards

For projects that must meet strict United Kingdom compliance standards, carefully review the BS 851188. These codes are traditionally managed through the British Standards Institute (BSI), which serves as the UK’s National Standards Body. The BSI covers technical standards, certification, and code-related business support. Before certification, products need to be tested at a recognized BSI facility to simulate real-world flooding conditions. This in-depth process provides valuable confidence, peace of mind, and reassurance for project stakeholders.

Here’s a summary of the British certification standards:

• Testing: Measure performance against hydrostatic water pressure & dynamic wave impacts.
• Leakage Limits:  Meet strict threshold limits on a per minute or per hour basis.
• Documentation: Results organized in installation manuals, guide, and quality control (QC) reports.

Compared to the United States’ ANSI/FM 2510, BSI standards emphasize leakage testing, O&M, and fabrication. Unlike FM Approvals, BS 851188 does not cover testing and longevity. Overall, US standards concentrate more on usability, impact/wear resistance, and annual maintenance verification. Compare UK BS 851188 stands vs traditional United States hazard mitigation building codes.