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IS 14264:1995 is the Indian Standard (BIS) for guidelines for design and construction of structures in high wind and flood prone areas. This standard provides guidelines for the design and construction of structures in areas prone to high winds (cyclones) and flooding. It outlines best practices for site selection, structural configuration, material usage, and construction techniques to enhance disaster resilience and minimize damage.
Provides combined guidelines for design and construction of structures to resist both high wind and flood effects.
Overview
Status
Current
Usage level
Specialized
Domain
Structural Engineering — Disaster Resilience and Retrofitting
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always establish the Design Flood Level (DFL) and maximum expected scour depth from local authorities before starting design.
! Pay close attention to the connection details, especially roof-to-wall and wall-to-foundation, as these are common failure points in high winds.
! These are guidelines; the final design must still comply with the mandatory provisions of primary load and material codes like IS 875 (Part 3) and IS 456/IS 800.
FEMA P-55 (2011)Federal Emergency Management Agency (FEMA), USA
HighCurrent
Coastal Construction Manual: Principles and Practices of Planning, Siting, Designing, Constructing, and Maintaining Residential Buildings in Coastal Areas
Comprehensive guideline for designing residential structures to resist high wind (hurricane) and flood (storm surge) loads in coastal areas.
ASCE/SEI 24-14American Society of Civil Engineers (ASCE), USA
HighCurrent
Flood Resistant Design and Construction
Provides minimum requirements for design and construction of structures in flood hazard areas, directly addressing the flood aspect of IS 14264.
International Building Code (IBC) 2021International Code Council (ICC), USA/International
MediumCurrent
International Building Code
A model building code that incorporates provisions for high wind and flood design by referencing standards like ASCE 7 and ASCE 24.
ABCB Handbook 2012Australian Building Codes Board (ABCB), Australia
MediumCurrent
Construction of buildings in flood hazard areas
Provides guidance on materials and construction methods for buildings in flood-prone areas, complementing the National Construction Code (NCC).
Key Differences
≠IS 14264 is a guideline providing broad recommendations, whereas standards like ASCE/SEI 24 and the IBC are mandatory, enforceable codes with more specific, performance-based requirements.
≠US standards (FEMA P-55, ASCE 24) use a well-defined hazard zone system, most notably the Coastal A Zone and V Zone (Velocity Zone), which dictates stringent foundation requirements (e.g., mandatory open pile foundations in V-Zones). IS 14264 lacks this specific zonation.
≠International standards provide detailed, distinct requirements for 'dry floodproofing' (making a structure watertight) and 'wet floodproofing' (allowing water to enter and exit). IS 14264 offers general advice on using resistant materials but does not formalize these distinct strategies.
≠The wind load basis differs significantly. Modern US codes (ASCE 7) use ultimate wind speeds with return periods of 700 to 1700 years for typical buildings, whereas IS 875 (referenced by IS 14264) is based on a 50-year return period wind speed.
Key Similarities
≈All standards identify building elevation as the primary and most effective strategy for flood protection, requiring the lowest occupied floor to be raised above a designated flood level.
≈A core principle in both the IS code and international equivalents is the need for a continuous load path, ensuring robust connections from the roof down to the foundation to resist wind uplift and lateral forces.
≈Both IS 14264 and international guidelines strongly recommend the use of flood-damage-resistant materials (e.g., concrete, masonry, treated metals) for all structural and non-structural components below the design flood elevation.
≈All standards emphasize the importance of proper site selection, advising against construction in the most hazardous areas and guiding site planning based on topography and historical hazard data.
Parameter Comparison
Parameter
IS Value
International
Source
Minimum Freeboard above Flood Level
Plinth level at least 0.6 m above the High Flood Level (HFL) or highest recorded flood level.
Lowest floor must be at or above the Base Flood Elevation (BFE). Many jurisdictions mandate additional freeboard (e.g., BFE + 1 to 3 feet).
ASCE/SEI 24-14
Basis for Basic Wind Speed
3-second gust speed (m/s) at 10m height with a 50-year return period (as per the referenced IS 875-3:2015).
3-second gust speed (mph) at 10m height with return periods based on Risk Category (e.g., 700 years for Risk Category II buildings).
ASCE/SEI 7-22
Foundation in High-Velocity Wave Zones
Recommends pile foundations in coastal areas with high scour risk.
Mandates open foundations (piles, piers, columns) and prohibits the use of fill for structural support in Coastal V-Zones.
FEMA P-55 / ASCE/SEI 24-14
Openings for Wet Floodproofing
General recommendation for openings to allow passage of water.
Requires a total net area of at least 1 sq. inch of opening for every 1 sq. foot of enclosed area below the BFE, on at least two different walls.
ASCE/SEI 24-14
Structural Fill
Permits earthen mounds/fills for elevating buildings, with recommendations for slope protection.
Prohibited for structural support of buildings in coastal high hazard areas (V Zones) and coastal A zones.
ASCE/SEI 24-14
Roof Overhangs in High Wind
Recommends keeping roof overhangs to a minimum, preferably not exceeding 450 mm.
No prescriptive limit; overhangs must be specifically designed to resist calculated wind uplift pressures.
ASCE/SEI 7-22
⚠ Verify details from original standards before use
Key Values5
Quick Reference Values
Minimum Plinth Level Freeboard0.6 m above High Flood Level (HFL)
Recommended Roof Slope for Wind Resistance> 20 degrees
Minimum Foundation DepthBelow maximum anticipated scour depth
Minimum Lap of Roof Sheeting150 mm
Minimum Column Size for Cyclone Resistance230 mm x 230 mm
Tables & Referenced Sections
Key Tables
No tables data
Key Clauses
Clause 4 - Wind Load Considerations
Clause 5 - Flood Load Considerations
Clause 6 - Design and Construction Guidelines for Wind Resistance
Clause 7 - Design and Construction Guidelines for Flood Resistance
What is the recommended plinth level in a flood-prone area?+
The plinth level should be at least 0.6 m above the High Flood Level (HFL), or higher as specified by local authorities (Clause 7.2.1).
How can foundations be protected from floodwater scour?+
Foundations should be placed below the maximum anticipated scour depth to prevent undermining. Alternatively, provide protective aprons around the structure (Clause 7.2.2).
What type of roof is better in a high-wind area?+
Hipped or pitched roofs (with slopes > 20 degrees) generally perform better than flat roofs by reducing wind uplift forces. All roofs must be securely anchored to the supporting structure (Clause 6.3).
What is the importance of openings in high-wind design?+
The size and location of openings significantly affect internal pressure. It is crucial to design windows and doors to resist wind pressure and impact from flying debris (Clause 6.5).