Structural Advisory Committee (SAC) meeting

Thursday, June 8, 2023

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    Pursuant to San Francisco Building Code Sections 105.6 and, a Structural Advisory Committee (SAC) was formed to provide independent expert review and to make recommendations to the Director of Building Inspections on the proposed new building construction permit applications on sites which are proposed to be excavated, graded, and four new buildings erected at or near 1230 Twin Peaks Blvd. under Permit Application Nos.

    2021-0121-2964 1230 Twin Peaks Blvd. 4-story over basement Single Family Dwelling
    2021-0121-2967 1234 Twin Peaks Blvd. 4-story over basement Single Family Dwelling with ADU (ADU under a separate permit)
    2021-0121-2968 1238 Twin Peaks Blvd. 4-story over basement Single Family Dwelling with ADU (ADU under a separate permit)
    2021-0121-2969 1240 Twin Peaks Blvd. 4-story over basement Single Family Dwelling with ADU (ADU under a separate permit)

    undergoing such SAC Heightened Design Review as being within the zone subject to the Slope and Seismic Hazard Zone Protection Act per the San Francisco Building Code Section


    1. Call to order and roll call
    2. Chairperson selection

      The SAC will select a Chairperson to conduct this SAC review meeting.

    3. General public comment

      The SAC will take public comment on items not on this agenda.

    4. Applicant team presents proposed project with documents and plans
    5. Scope of review

      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.

    6. Public comment

      The SAC will take public comment on this project.

    7. SAC panel discussion
    8. SAC recommendations

      Motion of recommendations to the Director of Building Inspection, and for incorporation into project design, if any.

    9. Adjournment

    Date & Time

    Thursday, June 8, 2023
    1:00 pm

    Department of Building Inspection

    49 South Van Ness
    5th Floor, Room 578
    San Francisco, CA 94103
    View location on google maps


    Watch and participate live using the WebEx application. If you want to remain anonymous, you can put "Public" in the fields.

    Password: 1230TwinPeaks
    Join the meeting on WebEx


    Public Comment call-in number

    Access Code: 2486 829 5443, then press #

    To raise your hand for public comment on an agenda item, press * 3 when prompted by the meeting moderator.

    SAC meeting recording for 1230-1240 Twin Peaks Blvd.

    Use password: Av2eNwYE


    Structural Advisory Committee Meeting 6-8-23

    Submit a public comment

    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.

    Call in and make a public comment during the meeting

    Call in and make a public comment during the meeting

    Each member of the public may address the committee once for up to two minutes on any agenda item.

    Follow these steps to call in

    • Call 415-655-0001 and enter the meeting ID 2486 829 5443
    • Press #
    • Press # again to be connected to the meeting (you will hear a beep)

    Make a public comment 

    • After you've joined the call, listen to the meeting and wait until it's time for public comment
    • When the clerk announces it's time for public comment, dial *3 to get added to the speaker line
    • You will hear “You have raised your hand to ask a question. Please wait to speak until the host calls on you"
    • When you hear "Your line has been unmuted," you can make your public comment

    When you call

    • Make sure you're in a quiet place
    • Speak slowly and clearly
    • Turn off any TVs or radios

    Sunshine Ordinance

    Sunshine Ordinance

    Government's duty is to serve the public, reaching its decisions in full view of the public. Commissions, boards, councils and other agencies of the City exist to conduct the people's business. This ordinance assures that deliberations are conducted before the people and that City operations are open to the people's review.

    For more information on your rights under the Sunshine Ordinance or to report a violation of the ordinance, contact the Sunshine Ordinance Task Force:

    • By mail at 1 Dr. Carlton B. Goodlett Place, Room 244, San Francisco, CA 94102-4689
    • By phone at 415-554-7854
    • By email at

    Cell phones, pagers and similar sound-producing electronic devices

    Cell phones, pagers and similar sound-producing electronic devices

    The ringing of and use of cell phones, pagers and similar sound-producing electronic devices are prohibited at this meeting. Please be advised that the Chair or the Interim Chair may order the removal from the meeting of anyone responsible for the ringing or use of a cell phone, pager, or other similar sound-producing electronic devices.

    Language access

    Language access

    To request an interpreter for a specific item during the meeting, please contact the Technical Services Division at 628-652-3727, at least 72 hours in advance of the hearing.

    For questions about the Language Access Ordinance, please contact OCEIA at 415-581-2360 and ask for the Executive Director or Language Access Compliance Officer.

    Lobbying activity

    Lobbying activity

    Individuals and entities that influence or attempt to influence local legislative or administrative action may be required by the San Francisco Lobbyist Ordinance to register and report lobbying activity.

    For more information about the Lobbyist Ordinance, contact the Ethics Commission:

    • Mail: 25 Van Ness Avenue, Suite 220, San Francisco, CA 94102
    • Telephone: 415-252-3100
    • Fax 415-252- 3112
    • Website:

    Political contributions

    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 to learn more about whether your involvement in such matters affects your ability to make political contributions, or contact the Ethics Commission at or 415-252-3100.

    Last updated June 9, 2023