A recent inspection by the engineers, however, revealed the building — its north wall in particular — shifted yet again, rendering the main hall unstable, the release said. Further, the original contractors on the project — general contractor Larson Danielson out of LaPorte, K & S Engineers Inc. of Highland and subcontractor Illiana Remedial Action out of Hammond — failed to install grout in an area that leaves the main hall open to sudden damage, officials said.