ICC 2027 Code Development Update

From October 21-29, 2025, in Cleveland, OH, USA, the International Code Council (ICC) conducted the second Committee Action Hearings (CAH#2) for Group B for the development of the 2027 I-Codes.The subject matter most relevant to ACI committee work in Group B included general and structural design and construction requirements in the International Building Code (IBC), and design and construction requirements in the International Residential Code (IRC) and International Existing Building Code (IEBC) as shown in Table 1.Four hundred code change proposals receiving one or more comments were addressed at the Group B CAH#2.While many code change proposals were monitored for coordination and alignment with ACI committee work, only a few warranted testimony by ACI staff and members.• The 2027 IBC is expected to reference ICC IS-1150: Standard for 3D Automated Construction Technology for 3D Concrete Walls.Opposition was expressed against modifying the proposal to also permit compliance in accordance with UL 3401-19: Outline of Investigation for 3D Printed Building Construction.This was consistent with testimony recommended by ACI Committee 564, 3-D Printing with Cementitious Materials, and provided in previous code cycles opposing the addition of UL 3401 to the 2024 IBC and exempting concrete in the 2024 IRC Appendix BM: 3D-Printed Building Construction.The addition of UL 3401 was recommended for disapproval.• Testimony was provided to support only referring ACI CODE-318: Building Code for Structural Concrete-Code Requirements and Commentary Chapter 26 on Construction Documents and Inspections for specific special inspection and tests provisions in lieu of specific sections within Chapter 26.The International Building Code -Structural Code Committee recommended approval of this proposal intended to minimize need for modifying nearly every edition of the IBC for coordination of tables and sections of the IBC and specific sections and subsections in subsequent editions of ACI CODE-318.• Criteria adding special inspection for concrete reinforced with glass fiber-reinforced polymer reinforcement and Table 1