Question

Koti-Banal architecture is

• A. An ancient, earthquake-resistant, building style of Uttarakhand
• B. Mud and timber architecture of Ladakh
• C. Bamboo dwellings of Assam
• D. Mud and wattle dwellings of coastal Andhra

Hint:

Koti-Banal is a classic example of indigenous seismic engineering. It is synonymous with the traditional earthquake-resistant timber-and-stone architecture of Uttarakhand.

Answer 1

The Correct Option is A

Concept: Vernacular architecture often evolves ingenious structural methods to withstand localized natural disasters. In the high-seismic zones of the Indian Himalayas, indigenous builders developed timber-and-stone bonding techniques that provide high flexibility and structural integrity during severe earthquakes. One such prominent architectural typology is the Koti-Banal style.

Step 1: Technical attributes of Koti-Banal architecture.
Originating hundreds of years ago in the Rajgarhi area of Uttarkashi district in Uttarakhand, the Koti-Banal style features unique architectural defenses against earthquakes:
• Layered Structural Layout: It employs a continuous configuration of thick wooden logs layered alternatingly with dry stone masonry walls without using weak mortar.
• Structural Flexibility: The interlaced wooden beams act as seismic bands. During an earthquake, this allows the stone units to shift slightly without collapsing, absorbing and dissipating the kinetic energy of seismic waves safely.
• Foundation and Elevation: The houses are constructed on a heavy, solid stone foundation platform, keeping a low center of gravity and utilizing light timber structures on upper floors to limit structural momentum.

Step 2: Characterizing alternative Indian vernacular styles.

• Ladakh architecture: Relies on heavy sun-dried mud bricks (adobe), thick rammed-earth walls, and flat roofs composed of poplar and willow branches due to the extremely arid, high-altitude cold desert environment.
• Assam dwellings: Utilizes indigenous lightweight bamboo frameworks and plaster coatings (Ikra architecture) designed to perform well in high-rainfall flood zones and active seismic terrains of Northeast India.
• Coastal Andhra dwellings: Typically made of local mud mixed with agricultural straw and thatched roofs (Chuttillu houses), built in circular shapes to deflect high-velocity coastal cyclonic winds.