Chapters 18 and 18A Soils and Foundations
Chapter 18 – Soils and Foundations
Office of Statewide Hospital Planning and Development
1803.2 [Geotechnical] Investigations required
Added OSHPD 1R and 5 banners to exceptions regarding geotechnical reports not being required for one-story, wood-frame and light-steel-frame buildings of Type V construction and 4,000 square feet (371 m2) or less in floor area, under certain seismic conditions
1807.2 Retaining walls
Deleted OSHPD banner and amendment regarding retaining walls.
1807.2.5 Freestanding cantilever walls
Deleted OSHPD banner and amendment regarding freestanding cantilever walls. ASCE 7 Section 15.6.8 requires ground supported walls and ASCE Section 15.6.1 requires earth-retaining structures to be designed as non-building structures.
1810.3.9.4.2.1 [Deep foundations] Site Classes A through DE
Repealed amendment to align with the model code provisions regarding performance of spirally reinforced piles being equivalent for concrete and grout.
Chapter 18A – Soils and Foundations
Division of the State Architect and
Office of Statewide Health Planning and Development
1803A.6 Geohazard reports
Divided Exception #1 into Exceptions #1 and #2 for clarification of geohazard reports not being required for specific scopes of work in existing buildings and repairs for damage not caused by an earthquake. Added OSHPD 1 and 4 banners to this exception regarding incidental structural additions or alterations.
Repealed requirement to use Next Generation Attenuation West 2 relations in the development of site-specific ground motion hazards.
1812A.5 Earth Retaining Shoring Construction
Revised Item #8 for soldier pile construction to use of defined terms consistently and with clarity. Use of the term “lean concrete” has been confused with the term “plain concrete” that is prohibited by DSA and OSHPD. Terminology is aligned with the model code definition of “controlled low-strength material” or CLSM.
Division of the State Architect
1810A.3.11.2 Seismic design categories D through F
Added DSA banner and amendment to not permit the application of model code
Item #1.3 to eliminate a potential conflict with foundation design loads required by an existing amendment in Section 1617A.1.15.
Office of Statewide Health Planning and Development
1807A.2 Retaining walls
Deleted amendment regarding freestanding cantilever walls which is covered in model code.
1807A.2.5 Freestanding cantilever walls
Deleted amendment and OSHPD exception regarding freestanding cantilever walls.