IS 15499

: 2004

Guidelines for Survey of Housing and Building Typology in Cyclone Prone Areas for Assessment of Vulnerability of Regions and Post Cyclone Damage Estimation

CurrentSpecializedGuidelinesStructural Engineering · Cyclone Resistant Structure
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This standard provides guidelines for conducting surveys of housing and building typologies in cyclone-prone areas. It establishes a framework for assessing regional vulnerability before a cyclone and for estimating damage after a cyclone, facilitating standardized data collection and risk analysis.

Guidelines for Survey of Housing and Building Typology in Cyclone Prone Areas for Assessment of Vulnerability of Regions and Post Cyclone Damage Estimation

Quick Reference Values
Damage Grade G0No damage
Damage Grade G1Slight damage (e.g., loss of roof tiles <10%)
Damage Grade G2Moderate damage (e.g., loss of roof tiles >10%)
Damage Grade G3Heavy damage (e.g., small part of wall collapsed)
Damage Grade G4Very heavy damage (e.g., large part of wall collapsed)
Damage Grade G5Collapse (e.g., more than 50% of building collapsed)
Building Typology identifier formatWALL-ROOF-FLOOR-CLASS (e.g., URM-A-G-II)
Practical Notes
The code's strength lies in its detailed annexes, especially the survey forms (Annex C and E) and classification tables (Annex B and D).
The assessment is primarily visual and qualitative, requiring experienced surveyors for accurate classification of building typology and damage.
This is a macro-level tool for regional assessment and planning, not for the detailed structural analysis of an individual building.