Hollow baked brick buttresses were later built up against the original "granary" structure on top of a shallow mud-brick platform  that itself overlies the mud-brick platform of the original "granary". Below these platforms is baked brick wall
Ancient Indus Civilization "granary" excavations and materials. Note that the earlier interpretation of these constructions are Harappa and Mohenjo-daro in particular are not thought of as granaries by modern archaeologists; their purpose remains unclear.
Detail view of a hollow area that would originally have held a wooden beam bonded into the baked brick structure. In the background is a wall remnant from the later rebuilding of the "granary".
Deep digging at the southeast corner of the "granary" revealed an earlier building [wall 330] constructed along the same east-west alignment. This structure could have been built as early as the beginning of Period 3B, ca. 2450 BC.
Aerial view of the exposed southeastern portion of the "granary" structure shows the nature of brick bonding and the empty sockets that would have held wooden beams and supports.
Clearing outside the southeast corner of the "granary" revealed the underlying mud-brick platform and the top of the baked brick revetment.
After clearing the overlying silt, the original forms of the baked brick walls and hollow buttresses of the "granary" could be made out.
Section through the northwestern portion of the "granary" platform directly below the baked brick "granary" walls (Trench 1NW). Similarity of composition of the mud-bricks in the northwestern, southwestern, and southeastern parts of the "granary"