Stratum IB lies directly above layer IC in several small contexts: in a pit in trench FF in the West Court; on the clay surface area in the Central Court --> connected to House L and the early phase of House J (J 1); in a small deposit in the South-West-Wing. 
The ground plan of the houses can be reconstructed through wall-remains and low foundation-pits (the walls and settlement layers were removed by leveling)