Disaster Safe Designs and Constructions

Engineering plays a vital role in ensuring that hazards do not become disasters.

1. Earthquake Resistant Design:

• Base Isolation: Separating the building from the ground using flexible pads (isolators) that absorb shocks.
• Damping: Using shock absorbers (dampers) to reduce vibrations.
• Lightweight Materials: Reduce the force generated during shaking.
• Bands/Ring Beams: Horizontal bands at different levels (plinth, lintel, roof) tie the walls together like a belt.

2. Flood Resistant Design:

• Elevation: Building on stilts or raised plinths above the High Flood Level (HFL).
• Waterproof Materials: Using concrete instead of mud/wood.
• Vertical Evacuation: Designing buildings with accessible rooftops for rescue.

3. Cyclone Resistant Design:

• Round Shapes: Aerodynamic shapes reduce wind pressure.
• Hip Roofs: Sloping roofs (pyramidal) fare better than flat or gable roofs.
• Anchoring: Roofs must be securely tied down to the walls to prevent flying off.