The foundation system was cast-in-place concrete spread and strip footings bearing on native- sand soils. Since new basement areas were lower than the existing building footings, stepped and cantilevered footing solutions had to be employed to solve foundation design challenges. An existing roadway, which had to remain operational posed a challenge in the installation of the new foundation. The working solution required an innovative combination of shoring and foundations cast and backfilled within steel coffers.
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