ASCE 7-22 was published in late 2021, and with the 2024 IBC now referencing it as the governing standard for environmental loads, states are adopting it through their code cycles. California adopted it effective January 1, 2026. Florida's 9th Edition FBC references it effective December 31, 2026. If you are submitting structural drawings in any jurisdiction that has moved to the 2024 IBC or a state code that references ASCE 7-22, your calculations and drawing documentation need to reflect the new edition.
The ASCE 7 committee has described the 7-22 edition as a "correction" to 7-16, which is partly true. Some of the changes simplify things that were unnecessarily complicated in 7-16, particularly around seismic site studies. But several changes are substantive enough that carrying forward 7-16 assumptions into a 7-22 jurisdiction will get your drawings sent back.
Here are the eight changes I see causing the most plan check friction right now.
1. All hazard data is now digital, not from printed maps
This is the most fundamental change in how you use ASCE 7. In previous editions, you could read wind speeds, snow loads, and seismic parameters from printed maps in the standard. ASCE 7-22 requires the use of digital data from the ASCE 7 Hazard Tool for all environmental hazards: wind, seismic, snow, ice, rain, flood, tornado, and tsunami.
The Hazard Tool is free and publicly accessible. You enter your project coordinates and it returns site-specific values. Plan reviewers in jurisdictions that have adopted ASCE 7-22 expect to see values from this tool on your cover sheet, not values interpolated from printed maps. If your general notes still reference "per ASCE 7-16 Figure 26.5-1A," that is an immediate red flag.
2. The seismic design spectrum is completely different
ASCE 7-16 used a two-point design spectrum based on the short-period (Ss) and 1-second (S1) spectral accelerations, with site coefficients Fa and Fv applied to get the design values. The result was a spectrum with a flat plateau region followed by a descending curve. You could calculate this by hand.
ASCE 7-22 replaces this with a Multi-Period Response Spectrum (MPRS) that uses 22 data points to define a smooth curve. The Fa and Fv coefficients are eliminated. The spectrum comes directly from the Hazard Tool based on your site coordinates and soil class. You cannot calculate it by hand anymore.
The site class definitions have also changed: ASCE 7-16 had six site classes (A through F). ASCE 7-22 has nine, with classification based more heavily on shear wave velocity. The practical result is that some sites will see higher seismic demands and some will see lower demands compared to 7-16, but the method for determining them is entirely different. Your structural analysis software needs to support 7-22 spectrum input, and your calculations need to reference the Hazard Tool output, not the old two-point method.
3. Wind speed maps have been revised in hurricane-prone regions
The basic wind speed maps in ASCE 7-22 were updated using improved hurricane simulation models. The changes are concentrated along the Gulf and Atlantic coasts. Along the south Texas coast, basic wind speeds increased by roughly 10 mph. Along coastal Louisiana, Mississippi, and Alabama, wind speeds generally decreased. The transition zones between hurricane and non-hurricane wind speeds have been refined.
If you work on coastal projects, you cannot assume that the wind speed from your last project in the same area still applies. Pull the current value from the Hazard Tool for each new project. Even a few mph difference can change component and cladding pressures enough to affect product selections.
4. Kd moved out of the velocity pressure equation
This is a calculation mechanics change that affects every wind load computation. In ASCE 7-16, the wind directionality factor Kd was included in the velocity pressure equation for qz. In ASCE 7-22, Kd has been removed from the qz calculation and added directly to the pressure and force equations in Chapters 27 through 30.
For most structures, the final pressure result is the same. But all of the intermediate calculations are different. If a plan reviewer is checking your wind load calculations step by step against 7-22 and your qz values still include Kd, the numbers will not match the standard, even if the final answer is correct. Update your calculation templates.
5. Simplified wind methods have been removed
ASCE 7-16 included simplified (Part 2 and Part 4) approaches for wind load calculations on certain building types, particularly low-rise simple diaphragm buildings. ASCE 7-22 has removed these simplified methods entirely. The remaining analytical methods have been renumbered, so "Part 2" in 7-22 is not the same as "Part 2" in 7-16.
If you have been using the simplified methods on smaller commercial or residential projects, you now need to use the more detailed analytical procedures. This adds complexity to what used to be a quick calculation, and it may require professional engineering interpretation where a simplified lookup table previously sufficed.
6. Tornado loads are now a code requirement
Previous editions of ASCE 7 addressed tornado loads only in the commentary. ASCE 7-22 adds a new Chapter 32 with mandatory tornado load provisions. The requirements apply to Risk Category III and IV structures (high-occupancy buildings and essential facilities) located in tornado-prone regions, which covers most of the area east of the Rocky Mountains.
Chapter 32 uses a layout and equation structure similar to the basic wind load chapters, so the learning curve is manageable if you already know wind design. But the key point for structural drawings is that you now need to check both hurricane/wind and tornado wind speeds for applicable buildings and design for whichever governs. Your cover sheet should indicate whether tornado loads were evaluated and, if so, what the mapped tornado wind speed is for the site.
| Topic | ASCE 7-16 | ASCE 7-22 |
|---|---|---|
| Hazard data source | Printed maps in standard | Digital data from ASCE 7 Hazard Tool (required) |
| Seismic spectrum | Two-point (Ss, S1) with Fa/Fv | 22-point Multi-Period Response Spectrum (MPRS) |
| Site classes | 6 classes (A through F) | 9 classes, based more on shear wave velocity |
| Wind directionality (Kd) | In velocity pressure (qz) equation | Moved to pressure/force equations |
| Simplified wind methods | Available (Parts 2, 4) | Removed |
| Tornado loads | Commentary only | Mandatory Chapter 32 for Risk Cat. III/IV |
| Snow loads | Based on printed maps, importance factors | Risk-targeted, load factor 1.0, no importance factors |
| Elevated buildings | Not specifically addressed | New provisions for wind on elevated structures |
7. Snow load methodology has been overhauled
Snow loads in ASCE 7-22 are now risk-targeted, similar to how wind loads were restructured in ASCE 7-10. The importance factors for snow have been removed, and the load factor in the strength design load combination has changed to 1.0 (from 1.6 in some combinations). A new mapped variable accounts for "winter windiness," which affects drift heights. Areas with the same ground snow load can now have different drift heights based on local wind patterns during winter months.
The drift load calculations have been updated using physics-based simulations rather than the historical observation data used in 7-16. If your project is in a snow region, the drift loads on your drawings may need to be recalculated even if the ground snow load appears similar to the 7-16 value.
8. New provisions for elevated buildings
ASCE 7-22 adds specific provisions for wind loads on elevated structures, such as homes on stilts in flood-prone or coastal regions. Previous editions did not directly address the wind forces on the underside of elevated buildings, which left engineers to make judgment calls about how to handle the exposed floor surface and the open area beneath the structure.
The new provisions include component and cladding pressure coefficients for the bottom horizontal surface (floor) of elevated buildings. If you design elevated structures in coastal or flood-prone areas, these provisions give you a defined methodology where you previously had to rely on engineering judgment or wind tunnel testing.
What to check on your drawings
If you are transitioning from a 7-16 jurisdiction to a 7-22 jurisdiction (or if your jurisdiction has already adopted 7-22), here is what needs to change on your structural drawings:
General notes should reference ASCE 7-22, not ASCE 7-16. Design wind speeds on the cover sheet should come from the Hazard Tool, not from printed maps. Seismic design parameters should reference the MPRS, not the two-point Ss/S1 method. If the project is Risk Category III or IV, indicate whether tornado loads were evaluated. Update your wind calculation templates to move Kd out of the qz equation. Verify snow drift calculations against the new methodology if the project is in a snow region.