501G.4 Exemptions for Certain Concrete Buildings.

501G.4 Exemptions for Certain Concrete Buildings. Concrete Buildings for which one or more of the following apply are not subject buildings, as determined by Department approval of a Screening Form as required by Section 502G.1:

(a) Age. The building complies with Section 304.4.1.

(b) One-story. The building has no more than one story above grade plane, as defined in San Francisco Building Code Chapter 2, excluding mezzanines.

(c) Two-story. The building conforms to all the following:

• The building has no more than two stories above grade plane, excluding mezzanines;

• The building does not include concrete columns or wall piers; and

• The building includes a structural reinforced concrete diaphragm at the second floor, the roof, or both.

(d) Complete steel frame. Steel columns support all the gravity floor load and roof load, and steel columns are connected to steel beams.

(e) Concrete used only for floors, roofs, foundations, or basements. All concrete elements that define the building as a Concrete Building extend less than four feet above adjacent grade.

(f) Previous retrofit. There is building permit documentation that the building has been seismically retrofitted to meet one of the following:

• Section 304.3 of the 2022 SFEBC

• Section 303.4 of the 2019 SFEBC

• Section 301.2 of the 2016 SFEBC

• Section 3401.10 of the 2013 SFBC

• Section 3401.8 of the 2010 SFBC

• Section 3403.5 of the 2007 SFBC

(g) One- and two-family dwellings. The building conforms to all the following:

• The building contains no more than two dwelling units.

• The building contains only Group R 3 occupancy and incidental Group U occupancy.

(h) Light -frame over one-story concrete podium. The building conforms to all the following:

• All concrete elements that define the building as a Concrete Building extend no more than one story above grade plane.

• All stories above the concrete story consist of light-frame (wood or cold-formed steel) construction.

(Added by Ord. 70-25, File No. 250211, App. 5/9/2025, Eff. 6/9/2025)