Council removes ASCE7 supplement 2 from adoption package, citing cost and mapping sync concerns
Mar 20, 2026
After staff posted two versions of an IBC proposal referencing ASCE7 supplements, the council voted to file an amended version that excludes supplement number 2 — which would have expanded flood‑hazard design areas from the 100‑ to 500‑year floodplain for many risk categories — citing large cost and coordination risks.
The full story
At its March 20 meeting the Building Code Council directed staff to file an amended IBC proposal (24GP1053R1) that removes Supplement Number 2 from the ASCE7 reference standard. Staff had posted two versions: the original approved by the TAG and a revised version removing Supplement 2 following concerns.
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