Section 1911A — EXISTING CONCRETE STRUCTURES — 2025 California Building Code (Title 24, Part 2)

1911A.1 Existing concrete structures. ¶

1911A.1 Existing concrete structures. The structural use of existing concrete with a core strength less than 1,500 psi (10.3MPa) is not permitted in rehabilitation work. 19A-10 2025 CALIFORNIA BUILDING CODE on Jul 18, 2025 11:14 AM (CDT) THEREUNDER. CONCRETE For existing concrete structures, sufficient cores shall be taken at representative locations throughout the structure, as designated by the architect or structural engineer, so that knowledge will be had of the in-place strength of the concrete. At least three cores shall be taken from each building for each 4,000 square feet (372 m [2]…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application

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1911A.2 Crack repair by epoxy injection. ¶

1911A.2 Crack repair by epoxy injection. Crack repair of concrete and masonry member by epoxy injection shall conform to all require- ments of ACI 548.15.

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1911A.3 Concrete strengthening by externally bonded fiber reinforced polymer (FRP). ¶

1911A.3 Concrete strengthening by externally bonded fiber reinforced polymer (FRP). Design and construction of externally bonded FRP systems for strengthening concrete structures shall be in accordance with ACI 440.2R. Exceptions: 1. Near-Surface Mounted (NSM) FRP bars shall not be permitted. 2. Strengthening of shear walls and diaphragms (including chords and collectors) shall be considered as an alternative system. Design capacities, reliability, serviceability of FRP materials shall be permitted to be established in accorda nce with ICC-ES AC 125. Minimum inspection requirements of FRP…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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