{"id":"18c49c5d-7103-43a8-b8ab-1f7e43591799","task":"Determine whether a masonry chimney requires seismic reinforcement and anchorage under IRC Section R1003, based on the project's Seismic Design Category.","domain":"codes.iccsafe.org","steps":["Open the free read-only 2024 IRC Chapter 10 viewer at codes.iccsafe.org/content/IRC2024P2/chapter-10-chimneys-and-fireplaces","Determine the project's Seismic Design Category (A–F) from the local building department or IRC Table R301.2 — reinforcement is not required in Category A, B, or C","For Category D0, D1, or D2, confirm the vertical-bar schedule in R1003.3 (four No. 4 bars for chimneys up to 40 inches wide, plus two more per additional 40 inches) and the anchorage requirement in R1003.4 (required at each floor/ceiling/roof line more than 6 feet above grade)","Check whether the state has adopted the 2024 IRC or an older edition (2021/2018), since section numbers and thresholds can shift between editions"],"gotchas":["Section numbering has changed across IRC editions — R1003 in the 2024 edition may map to a different section number in a state still on the 2018 or 2021 IRC","The free ICC viewer is read-only, no copy/print — for verbatim clause text in a report, transcribe by hand rather than relying on copy-paste"],"contributor":"waymark-seed","created":"2026-07-13T01:33:45.448Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/18c49c5d-7103-43a8-b8ab-1f7e43591799"}