IBC 2024 Changes for Metal Building Contractors

The International Building Code 2024 was published by the International Code Council in late 2023 and is now being adopted by jurisdictions across the country. For metal building contractors, the changes that matter most are not the ones in the headlines — they're a handful of structural and reference- standard updates that quietly change how a foundation gets sized.

If you're submitting a permit set in a jurisdiction that has adopted IBC 2024 (or is moving to it), here's what's actually different.

The Big One: ASCE 7-22 Is Now the Reference Standard

IBC 2021 referenced ASCE 7-16 for loads. IBC 2024 references ASCE 7-22. That single change cascades into several real foundation impacts:

• New seismic ground-motion maps. ASCE 7-22 introduced multi-period response spectra that change Site Class effects and Seismic Design Category determinations in some regions. Some sites that were SDC C under ASCE 7-16 are SDC D under ASCE 7-22 — and vice versa, in a few places. You can't assume the SDC carries over.
• Updated wind speed maps. Coastal hurricane regions generally got minor adjustments; some inland areas saw small increases. The bigger structural change: ASCE 7-22 treats tornado loads as a separate load case for certain occupancy categories. Most PEMB projects aren't affected, but Risk Category III and IV buildings in tornado-prone regions need to be checked.
• Snow load methodology. ASCE 7-22 reorganized the snow load chapter, including new ground-snow values for some locations and clearer rules on partial loading and unbalanced loading on low-slope roofs (i.e., most metal buildings).
• New flood hazard provisions. Updates to Chapter 5 (Flood Loads) tighten requirements in coastal A and V zones.

If your manufacturer's reaction tables were generated to ASCE 7-16 and your jurisdiction now requires ASCE 7-22, your loads may need to be re-issued. Always confirm.

Foundation-Specific Changes in IBC 2024

A few changes inside the IBC text itself directly affect foundation design:

Section 1803 (Geotechnical Investigations). Mostly editorial clarifications, but the rules around when a geotech report is required have been tightened slightly for certain seismic and slope conditions. If your project was on the edge of the geotech-required threshold under IBC 2021, double-check under IBC 2024.

Section 1806 (Presumptive Load-Bearing Values). Table 1806.2 (the table you fall back on when you don't have a geotech report) remains substantively the same. The presumptive values have not changed materially.

Section 1807 (Foundation Walls, Retaining Walls, Embedded Posts and Poles). Updated language on lateral earth pressure calculations and a few clarifications on retaining-wall design for unbalanced backfill.

Section 1810 (Deep Foundations). Reorganized for clarity. Pile capacity, group effects, and uplift provisions are substantively similar but easier to follow. If you build with drilled piers or driven piles in your region, expect plan reviewers to be slightly more rigorous about documentation.

ACI 318 reference. IBC 2024 still references ACI 318-19 (not the newer ACI 318-25, which is too recent for inclusion). This is the standard for concrete and anchor bolt design. Anchor bolt provisions are unchanged from the IBC 2021 baseline.

What Hasn't Changed (and Doesn't Need to Be Re-Engineered)

Some good news: many of the structural fundamentals are stable between IBC 2021 and IBC 2024.

• Load combinations (Section 1605) — same factored combinations.
• Most Risk Category assignments (Table 1604.5) — unchanged.
• Live loads on roofs and floors (Table 1607.1) — unchanged.
• Concrete design per ACI 318-19 — unchanged.
• Steel design per AISC 360 — unchanged (still 2016 edition for most provisions).

If your jurisdiction is moving from IBC 2021 to IBC 2024, you don't need to rebuild every standard detail from scratch. You do need to verify the load updates and the seismic SDC.

Adoption Status: Where IBC 2024 Is Live

State adoption rolls out unevenly. The International Code Council maintains the authoritative state and local adoption tracker. As of early 2026, a growing number of states have adopted IBC 2024 statewide; many large cities are still on IBC 2021 with 2024 adoption planned for 2026 or 2027. Always confirm with your local Authority Having Jurisdiction before designing.

A few states (Texas, Colorado, Kansas, Missouri, Arizona) have no statewide commercial code adoption — adoption is local, so even within one state you can have neighboring cities on different IBC editions.

What to Do Right Now

If you're a contractor running active PEMB projects:

1. Check your AHJ's adopted code. Phone call or website. Don't assume.
2. If the AHJ is on IBC 2024 and your reaction tables were issued to ASCE 7-16: ask your manufacturer whether re-issue is needed. Many will provide ASCE 7-22 loads at no charge.
3. For projects in transitional jurisdictions: the AHJ may still accept IBC 2021 designs for a grace period. Confirm before starting engineering.
4. For sites in seismic transition zones: (parts of the central US, edges of the New Madrid zone, parts of the Mountain West) — verify the SDC under the current adopted edition.

How SteelReady Handles Code Versions

We confirm the adopted IBC and ASCE editions with the AHJ before we engineer your package. If your jurisdiction is on IBC 2024 / ASCE 7-22, we design to it. If your jurisdiction is still on IBC 2021 / ASCE 7-16, we design to that. We document the adopted editions on the foundation general notes so the permit reviewer sees exactly what we designed against.

Ready to Get a Price?

Send us your reaction tables and your project address — we'll confirm the AHJ's adopted code and send back an exact, fixed-price quote within an hour.

Get a Quote · info@steelready.com · (435) 851-1522