Section 1903 — SPECIFICATIONS FOR TESTS AND MATERIALS
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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1903.1 General. ¶
1903.1 General. Materials used to produce concrete, concrete itself and testing thereof shall comply with the applicable standards listed in ACI 318. Exception: The following standards as referenced in Chapter 35 shall be permitted to be used. 1. ASTM C150 2. ASTM C595 3. ASTM C1157
1903.2 Glass fiber-reinforced concrete. ¶
1903.2 Glass fiber-reinforced concrete. Glass fiber-reinforced concrete (GFRC) and the materials used in such concrete shall be in accordance with the PCI 128.
1903.3 Flat wall insulating concrete form (ICF) systems. ¶
1903.3 Flat wall insulating concrete form (ICF) systems. Insulating concrete form material used for forming flat concrete walls shall conform to ASTM E2634. [OSHPD 1R, 2 & 5] Not Permitted by OSHPD.
1903.4 Steel fiber reinforcement - [OSHPD 1R, 2 & 5] Not permitted by OSHPD. ¶
1903.4 Steel fiber reinforcement - [OSHPD 1R, 2 & 5] Not permitted by OSHPD. on Jul 18, 2025 11:14 AM (CDT) THEREUNDER. � CONCRETE
1903.5 Welding of reinforcing bars - [OSHPD 1R, 2 & 5] Modify ACI 318 Section… ¶
1903.5 Welding of reinforcing bars - [OSHPD 1R, 2 & 5] Modify ACI 318 Section 26.6.4.1(b) by adding the following: Subject to prior approval of the enforcing agency, longitudinal holding wires conforming to ASTM A1064, of maximum wire size W5, that are machine resistance welded to stirrup/tie cage (or spiral assemblies) consisting of low alloy steel reinforcing conforming to ASTM A706 are permitted when performed under continuous competent control in a fabrication shop. Tack welding of primary rein- forcing bars together or to stirrups/ties is not permitted. Holding wire weld locations shall…