A new office building on a small lot in the heart of Santa Monica, CA, was designed with four levels of underground parking, which required shoring around the entire perimeter.  Site access was extremely limited and required close coordination with the excavation subcontractor.  Schnabel Foundation Company designed and constructed over 28,000 sf of temporary soldier beam and tieback shoring.

High capacity tiebacks were used to minimize the number of rows of anchors.  The subsurface soil consisted of layers of silty clays and fine sands, so a combination of lagging methods was used.  Shotcrete lagging was used in the silty clay zones, and wood lagging was used in the sandy layers.