Meeting details
Date and time
How to participate
Online
Meeting details
Date and time
How to participate
Online
Overview
SAC review for Permit Application Number 202205124153 1900 Diamond St. 4-story Single Family Dwelling 202205124157 1902 Diamond St. 4-story Single Family Dwelling 202205124111 1950 Diamond St. 4-story a 20-unit Residential Building 202205124175 1980 Diamond St. 4-story Single Family Dwelling 202205124119 1990 Diamond St. 4-story Single Family DwellingAgenda
Background of project in review
Under the conditions of The Slope and Seismic Hazard Zone Protection Act (SFBC 106A.4.1.4), the proposed project is subject to mandatory submittals and heightened review of reports by a Structural Advisory Committee as defined by SFBC 105A.6.
106A.4.1.4 The Slope and Seismic Hazard Zone Protection Act. This Section of the San Francisco Building Code shall be known as the Slope and Seismic Hazard Zone Protection Act.
106A.4.1.4.1 Creation. The Slope and Seismic Hazard Zone Protection Act shall apply to all property within San Francisco that exceeds an average slope of 4 horizontal to 1 vertical grade or falls within certain mapped areas of the City, except those properties already subject to the Edgehill Mountain Slope Protection Area or the Northwest Mt. Sutro Slope Protection Area. For purposes of this Section “property” shall mean a legal lot of record. Heightened review of certain permit applications, as provided in this section, shall be given to all property subject to this Act.
106A.4.1.4.2 Purpose. Because landslides, earth movement, ground shaking, drainage issues, and subsidence are likely to occur on or near steeply sloped properties and within other defined areas causing severe damage and destruction to public and private improvements, the Board of Supervisors finds that the public health, safety, and welfare is best protected if the Building Official causes permit applications for the construction of new buildings or structures and certain other construction work on property subject to the Slope and Seismic Hazard Zone Protection Act to undergo additional review for structural integrity and effect on hillside or slope stability. The requirements for projects subject to the Slope and Seismic Hazard Zone Protection Act are in addition to all other applicable laws and regulations, including any and all requirements for environmental review under the California Environmental Quality Act; compliance with the requirements contained herein does not excuse a project sponsor from compliance with any other applicable laws and regulations.
106A.4.1.4.3 Scope. (a) Properties are subject to these requirements where: (1) any portion of the property lies within the areas of “Earthquake-Induced Landslide” in the Seismic Hazard Zone Map, released by the California Department of Conservation, Division of Mines and Geology, dated November 17, 2000, or amendments thereto or (2) the property exceeds an average slope of 4 horizontal to 1 vertical slope. (b) Proposed construction work that is subject to these requirements includes the construction of new buildings or structures having over 1,000 square feet of new projected roof area and horizontal or vertical additions having over 500 square feet of new projected roof area. In addition, these requirements shall apply to the following activity or activities: shoring, underpinning, excavation, or retaining wall work; grading, including excavation or fill, of over 50 cubic yards of earth materials; or any other construction activity that, in the opinion of the Building Official, may have a substantial impact on the slope stability of any property.
The proposed permit applications are proposing site excavation and grading, and construction of earth retaining structures, and new residential buildings along a very steep slope along the hillside, and are subject to the requirement of review by Structural Advisory Committee. The Structural Advisory Committee (SAC) will convene to review and provide expert professional opinions concerning items as stipulated in SFBC Section 105A.6.3 and 106A.4.1.4. (attached herein).
The subject permit application is under the jurisdiction of the 2019 edition of the San Francisco Building Code, being the version prevailing at time of permit application.
Call to order and roll call
Chairperson selection
The SAC will select a Chairperson to conduct this SAC review meeting.
General public comment
The SAC will take public comment on items not on this agenda.
Scope of review
Per SFBC Sections 105A.6.3 and 106A.4.1.4, SAC will perform the design review to provide the Director of Building Inspection with a written report concerning the following review considerations, as applicable:
- the safety and integrity of the proposed design and construction;
- the effect that grading construction activity related to the proposed project will have on the safety and slope stability of the area during the construction sequence, and after the construction at subsequent development stages, and interim measures to mitigate any potential sliding and erosion of the site;
- the validity and appropriateness of the geotechnical/structural design concepts and criteria;
- the adequacy of the geotechnical and geological investigation and study and the appropriateness of the recommended design parameters;
- the evaluation of the grading design in preparation of the planned future building/structure development, to determine the appropriateness of its capability to perform satisfactorily without failure; any perpetual limitation of the site to be imposed regarding the level of future development, such as the future excavations, and/or vertical and horizontal additions from the original plan.
- the constructability of proposed structural details and construction sequencing and methods;
- the sufficiency of the proposed inspection, testing and monitoring to be provided prior to, during, and after construction.
- items to be reviews will include but not limited to geotechnical and geological investigation and study, designs, details, drainage, erosion during and after construction, construction/erection methods, appropriateness and adequacy of the proposed shoring design, quality control and special inspection specified.
- Site monitoring plan during and after improvement and installation are constructed;
- Necessity of follow-up review by the SAC for the additional site findings by the Geotechnical Engineer and Certified Engineering Geologist of Record’s during grading, excavation, and construction are the assumed and recommended geotechnical/geological design parameters.
The review shall include the evaluation of the stability of the project site with regard to the proposed subsequent development and the effect of its development on the stability of adjacent Areas. Review will consider factors including but not limited to design criteria and performance objectives, soil and site conditions, geological factors, historic site stability, the anticipated foundation system designs, soil and site improvement systems design, shoring/earth retaining system design, structural systems design, on and off site drainage impacts, and other proposed improvement designs for compliance with design criteria and performance objectives.
Public comment
The SAC will take public comment on this project.
SAC panel discussion
SAC recommendations
Motion of recommendations to the Director of Building Inspection, and for incorporation into project design, if any.
Adjournment
Meeting resources
Video recording
Structural Advisory Committee Review 1900 Block of Diamond
Watch VideoRelated documents
Structural Advisory Committee Meeting 2-22-23
Structural Advisory Committee Meeting 2-22-23Notices
Submit a public comment
Pursuant to Section 67.7-1(c) of the San Francisco Administrative Code, members of the public who are unable to attend the public meeting or hearing may submit written comments regarding a calendared item to Technical Services Division, Department of Building Inspection at 49 South Van Ness Avenue, Suite 590, San Francisco, CA 94103 or at the place of the scheduled meeting. These written comments shall be made a part of the official public record.
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Political contributions
SF Campaign & Governmental Conduct Code section 1.127 prohibits any person with a financial interest in certain land use matters from making a political contribution to any committee controlled by an individual currently holding, or seeking election to, the office of Mayor, Supervisor, or City Attorney.
Solicitation or acceptance of such a contribution is also prohibited.
Be aware that certain matters pending before or acted upon by the Building Inspection Commission may constitute land use matters under section 1.127.
Please visit sfethics.org to learn more about whether your involvement in such matters affects your ability to make political contributions, or contact the Ethics Commission at ethics.commission@sfgov.org or 415-252-3100.