Gamma Classrooms Building,

St. Mary's College

Moraga, CA



   The challenging site was underlain by compressible clay material with low bearing capacity. The foundation solution required that new loads and distribution of those loads be minimized to prevent settlement. 

   This involved removal of approximately five feet of soils to offset the building weight, then placement of a mat foundation system. The combined weight of the new building and mat offset the weight of the excavated soil. The "crawl space" that resulted below the first floor became a utility space. The three-story wood-frame building with concrete block wall construction below the second floor has a footprint of 8,000 square feet, and provides classrooms and office space for the campus. The project was completed in 1996. 


Return to New Structures