This article provides an overview of the reorganization of Chapter 22 on steel in the 2024 International Building Code (IBC) and a discussion of new sections for metal building systems, industrial boltless steel shelving, industrial steel work platforms; and stairs, ladders, and guarding serving steel storage racks and industrial steel work platforms. Only a portion of the chapter’s total number of code changes is discussed in this article.

Concrete & Masonry (IBC Chapters 19 & 21)—Part 3.

Special inspection & soils/foundations (IBC Chapters 17 & 18)—Part 2.

Roof assemblies (Chapter 15)—Part 1.

This multi-part series discusses significant structural changes to the 2024 International Building Code (IBC) by the International Code Council (ICC). Part 1 includes an overview of changes to Chapter 15 on roof assemblies. Only a portion of the chapter’s total number of code changes are discussed in this article. More information on the code changes can be found in the 2024 Significant Changes to the International Building Code, available from ICC (Figure 1).

In the 2024 International Building Code (IBC) and 2024 International Fire Code (IFC), several changes were made to mass timber provisions, including the following:

Revised Component and Cladding (C&C) wind load provisions in ASCE 7-22, Minimum Design Loads and Associated Criteria for Buildings and Other Structures, produce in most cases either the same or slightly lower pressures than would occur under the prior edition while also preserving the extensive wind tunnel testing basis of the ASCE 7-16 C&C wind provisions.

Secondary drainage system rain loads have been updated in the 2021 International Building Code® (IBC) to be consistent with ASCE 7-16, Minimum Design Loads and Associated Criteria for Buildings and Other Structures. The following text shows the specific change in the 2021 IBC. Strike-through indicates deleted text and underlined denotes new text.