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Guidelines for Earthquake Resistant Buildings
A shaking of the earth caused by a sudden movement of rock bneath the Earth's surface. An earthquake occurs on a fault, which is a thin layer of crushed rock between two blocks of rock. A fault can range in length from a few centimeters to thousands of miles. Stresses in the earth's outer layer push the sides of the fault together. Stress builds up and the rocks slip suddenly, releasing energy in waves that travel through the rock to cause the shaking that we feel during an earthquake.
Earthquake Resistant Provisions in Masonry Buildings with Strip Foundation
| Zone | Max. Height | Mortar Mix | Bands | Vertical-Reinforcement | Diameter of Vertical Reinforcement | Mortar Mix for Band/Vertical Reinforcement. | Bracing of Pitched Roof. |
| III | Four storey(Less than 15 m) | 1:6 Cement sand or 1:2:9 cement-lime-sand | 1. Lintel band
2. Roof band/Gable Band . 3. Plinth Band. |
For Rock/Hard/ Medium soil-Not mandatory
for soft soil at joint and corners. |
For Rock/Hard/ Medium soil-Not mandatory
for soft soil-single bar 12mm(TOR)or 16mm(MS) |
1:3 Cement Sand or M 20 Concrete | Bracing at Tie Level. |
| IV | Four storey(Less than 15 m) | 1:6 Cement sand or 1:2:9 cement-lime-sand | 1. Lintel band
2. Roof band/Gable Band . 3. Plinth Band. |
At joints and corners for Rock/Hard/Medium/soft soil
At jambs and openings of soft soil. |
Single bar 12mm(TOR)or 16mm(MS) | 1:3 Cement Sand or M 20 Concrete | Bracing at Tie Level. |
| V | Four storey(Less than 15 m) | 1:4 Cement sand or 1:1:6 cement-lime-sand | 1. Lintel band
2. Roof band/Gable Band . 3. Plinth Band. |
At Joint and corners .
At jambs of opening. |
Single bar 20mm(TOR)or 25mm(MS) | 1:3 Cement Sand or M 20 Concrete | Bracing at
Tie Level.
|
Note:
- The buildings should be made of well -burnt bricks, solid concrete blocks, squared stones, stone blocks or hollow concrete blocks of adequate strength.
- Always consult and adhere to the Building Byelaws of the your city.
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