ASCE 7-22 Wind and Seismic Load Changes: What Structural Reviewers Need to Check

Why a structural reviewer needs to track this

Code editions move on a lag. A jurisdiction adopts the 2024 IBC on its own schedule, and until it does, ASCE 7-16 (referenced by the 2021 IBC) still governs. That means two projects submitted a few months apart, in two different jurisdictions, can legitimately reference two different ASCE 7 editions with two different sets of load parameters. A reviewer who assumes every set uses the same edition's numbers will miss a real discrepancy.

The more common failure mode is subtler: a design team updates the code reference on the general notes sheet to ASCE 7-22 but does not fully recalculate the seismic design parameters or wind pressure table underneath it. The reference changes; the numbers do not. That mismatch is exactly the kind of conflict our structural drawing review guide covers checking for on the general notes sheet before moving into the framing plans.

What changed in the wind load provisions

Two changes matter most for drawing review. First, the component and cladding procedure, which governs pressures on cladding, roof panels, and other envelope elements, was simplified to reduce the number of steps needed to determine design pressure. Second, ASCE 7-22 adds an entirely new chapter, Chapter 32, covering tornado loads for Risk Category III and IV buildings located in mapped tornado-prone regions of the country.

• Component and cladding pressures: Check that the wind pressure table on the general notes sheet references the correct exposure category and basic wind speed for the project site.
• Tornado loads (Chapter 32): For Risk Category III and IV structures (hospitals, emergency operations centers, and similar), confirm the general notes address tornado loads where the project site falls inside a mapped tornado-prone region.
• Wind speed maps: Updated maps mean the basic wind speed for a given site can differ from the ASCE 7-16 figure, so a carried-over number from a prior project template is worth double-checking against the current map.

What changed in the seismic design provisions

The seismic changes in Chapters 11 through 23 mark a real departure from prior editions. ASCE 7-16 and earlier used a two-point design spectral acceleration curve based on the parameters SS and S1, with a flat “plateau” region in the middle of the spectrum. ASCE 7-22 replaces that with a smooth, 22-point design response spectrum built directly from updated hazard data, with no plateau.

Because the spectrum shape changed, base shear values calculated under ASCE 7-22 will not always match what the same building would have produced under ASCE 7-16, even holding the site and structure constant. Seismic Design Category, SDS, SD1, and the response modification factor R shown in the general notes should reflect a genuine ASCE 7-22 calculation rather than a copy-forward from an older project.

Where these changes show up on structural drawings

The general notes sheet is where a reviewer will find the most direct evidence of which edition actually governs the calculations, not just which edition is named in the code reference block. Look at four things: the code edition callout itself, the wind design table (basic wind speed, exposure category, and any tornado load statement), the seismic design parameter table (Site Class, SS, S1, SDS, SD1, Seismic Design Category, R), and the load combination list. If the edition reference reads 2024 IBC / ASCE 7-22 but the seismic parameters look identical to a project designed the year before under ASCE 7-16, that inconsistency is worth an RFI before the foundation and framing plans get built around it. Our code compliance checklist covers the broader process for reconciling a general notes sheet against the code edition it claims to follow.

How this compares to other recent code-cycle updates

ASCE 7-22 is one of several code-edition transitions reviewers are tracking at once in 2026. We covered the sprinkler-side changes in NFPA 13 2025 edition changes and the electrical-side updates in NEC 2026 updates. The pattern across all three is the same: a code cycle changes the underlying calculation method, and the drawing conflicts show up when a project's general notes reference the new edition without every downstream number actually reflecting it.

How Helonic helps

Helonic reads the structural general notes sheet against the rest of a drawing set and flags where a code edition reference, wind design table, or seismic parameter looks inconsistent with the framing and foundation plans built around it, one of the ten issue categories covered under code compliance checking. For structural-specific coordination and foundation review, see Helonic for structural engineers.

ASCE 7-22 FAQ