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Where excavation will reduce support from any foundation, a registered design professional shall prepare an assessment of the structure as determined from examination of the structure, available design documents, available subsurface data, and, if necessary, excavation of test pits. The registered design professional shall determine the requirements for support and protection of any existing foundation and prepare site-specific plans, details and sequence of work for submission. Such support shall be provided by underpinning, bracing, excavation retention systems, or by other means acceptable to the building official.

Related Code Sections

1803.5.7 Soils and Foundations, Excavation Near Foundations
Where excavation will reduce support from any foundation, a registered design professional shall prepare an assessment of the structure as determined ...
1803.5.7 Soils and Foundations, Excavation Near Foundations
Where excavation will reduce support from any foundation, a registered design professional shall prepare an assessment of the structure as determined ...
1804.1 Soils and Foundations, Excavation Near Foundations
Excavation for any purpose shall not reduce vertical or lateral support for any foundation or adjacent foundation without first underpinning ...
1804.1 Soils and Foundations, Excavation Near Foundations
Excavation for any purpose shall not reduce vertical or lateral support for any foundation or adjacent foundation without first underpinning ...
3304.1 Safeguards During Construction, Excavation and Fill
of withstanding the additional loads caused by the fill or surcharge. Existing footings or foundations that can be affected by any excavation shall be underpinned ...