Question

how were the granaries built and what was their imfortance

Answer 1

The so-called "granary" of Harappa is found on Mound F. It is a brick structure that was built on a massive brick foundation over 45 meters north south and 45 meters east-west. Two rows of six rooms that appear to be foundations are arranged along a central passageway that is about 7 meters wide and partly paved with baked bricks. Each room measures 15.2 by 6.1 meters and has three sleeper walls with air space between them. A wooden superstructure supported in some places by large columns would have been built on top of the brick foundations, with stairs leading up from the central passage area. Small triangular opening may have served as air ducts to allow the flow of fresh air beneath the hollow floors.

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