FBC 2026 (9th Edition): what changes for structural design

Standard editions, 2023 and 2026

The standards structural design leans on, as each edition's referenced-standards chapter lists them (FBC Building Chapter 35):

Wind: still Florida's own wind speeds

Chapter 16 is substantively the same amendment as in 2023. §1609.1.1 sends wind loads to ASCE 7 Chapters 26 to 30, but leaves out the model IBC's sentence that permits the basic wind speed to be taken from ASCE 7 — so the ASCE 7 map, and tools that read it, do not govern in Florida. §1609.3 makes Florida's Figures 1609.3(1)–(4), one per Risk Category, the source of the ultimate design wind speed.

One real change: §1609.3.1 now converts V_ult to V_asd by Equation 16-17 alone. The 2023 edition allowed Table 1609.3.1 or the equation; Table 1609.3.1 does not appear anywhere in the 2026 Chapter 16.

The rest is wording: "garage doors" became "vehicle access doors" (§1609.1.2.2, §1609.7).

Concrete: Building amends ACI 318, Residential does not

FBC Building §1905, "Modifications to ACI 318", still rewrites clauses of ACI 318-19, including when ACI 318 Chapter 18 applies (§1905.1.2) and detailed plain concrete structural walls (§1905.1.6).

FBC Residential has no such section. Its references to ACI 318-19 are scoping statements — the prescriptive tables cover a wall up to a limit, and past it the wall is designed to ACI 318 as published. So the same concrete member resolves to ACI 318 as modified under the Building volume, and unmodified under the Residential volume.

Steel: AISC 360-22, and no AISC 341

Chapter 35 lists AISC 360-22 and AISC 370-21, and nothing else from AISC. Florida renumbers the steel chapter — structural steel is §2202, which reads in full that it shall be in accordance with AISC 360 — and has no counterpart to the IBC's seismic requirements for structural steel, which is the section that brings in AISC 341.

Roofing: the shingle wind table is unchanged

§1507.2.7.1 and Table 1507.2.7.1, which set the ASTM D7158 and D3161 class an asphalt shingle needs for a given basic wind speed, print the same eight rows in 2023 and 2026.

In PerCode

A Florida account in PerCode designs to either edition — FBC 2023 or FBC 2026 — and every report names the one it was checked against. PerCode for Florida →

This page compares only standards both editions' records list; it is not a complete list of changes. Which edition governs a permit is the building department's call.