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).

IS 14264

: 1995

Guidelines for Design and Construction of Structures in High Wind and Flood Prone Areas

CurrentSpecializedGuidelinesBIMStructural Engineering · Disaster Resilience and Retrofitting

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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.

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

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.