{"id":"kcc-20-10-ir1-ir2-noncombustible-appendage","license":"CC-BY-4.0","data":{"title":"Kittitas County IR1 and IR2 noncombustible appendage path","shortName":"Kittitas IR1–IR2 noncombustible deck","summary":"Kittitas County Code 20.10 prints approved noncombustible material as one path for attached unenclosed accessory structures and projections such as decks in IR1 and IR2.","framing":"This record covers only a documented noncombustible deck product path. Attachment to habitable space, the complete appendage construction, official IR class, water and defensible-space inputs, project scope, and County approval remain checks.","kind":"code","instrumentId":"kcc-14-12-20-10","jurisdiction":"Unincorporated Kittitas County IR1 and IR2 construction","placeIds":["us-wa-kittitas"],"appliesToCategories":["decking"],"quotedText":"Approved noncombustible materials.","source":{"title":"Kittitas County Code Title 20, Sections 504.7 and 505.7","url":"https://www.co.kittitas.wa.us/boc/countycode/title20.aspx","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"},"constraints":[{"attribute":"assemblyRole","op":"in","value":["deck-structure","deck-surface"]},{"attribute":"noncombustible","op":"eq","value":true}],"relatedStandards":["iwuic"],"author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-27T00:00:00.000Z"},"applications":[{"id":"kcc-wui-roof-kittitas-county","title":"Kittitas County WUI and locally printed construction application","instrumentId":"kcc-14-12-20-10","placeId":"us-wa-kittitas","status":"active","geographicScope":"unincorporated-county","scopeSummary":"Kittitas County declares every unincorporated area WUI and applies its current local WUI amendments there; Chapter 14.12 separately sets Class C, B, or A roof-covering floors by hazard class, but its classification system limits the hazard-specific Class A and B paths to areas outside a fire department. Parcel jurisdiction, that fire-department boundary, the current hazard map and class, water and defensible-space inputs, project trigger, exact classified configuration, effective date, and official review remain open.","adoptedOn":"2021-03-02T00:00:00.000Z","requirementIds":["kcc-14-12-high-extreme-class-a-roof-covering","kcc-14-12-moderate-class-b-roof-covering","kcc-14-12-low-general-class-c-roof-covering","kcc-20-10-ir1-one-hour-exterior-wall","kcc-20-10-ir1-noncombustible-exterior-wall","kcc-20-10-ir1-ir2-one-hour-appendage","kcc-20-10-ir1-ir2-noncombustible-appendage","kcc-20-10-table-503-nc-exterior-wall"],"requirementCoverage":"partial","requirementCoverageSummary":"Eight locally printed product-semantic paths are normalized: three Chapter 14.12 roof-covering floors, two IR1 exterior-wall alternatives, two shared IR1/IR2 appendage alternatives, and the Table 503.1 one-hour/noncombustible wall addition. This is not a full IWUIC crosswalk: the County code references the most current adopted IWUIC edition without printing an edition number, and its heavy-timber, log, FRT-wood, ignition-resistant-treatment, vent-location, sprinkler, water, and defensible-space paths are not reduced to product matches.","requirementScopes":[{"requirementId":"kcc-14-12-high-extreme-class-a-roof-covering","scopeKeys":["outside-fire-department","high-fire-hazard","extreme-fire-hazard"],"scopeSummary":"The Class A floor applies only after the County assigns high or extreme hazard, only in an area outside a fire department; a written Fire Marshal alternative may control a specific project.","sourceSections":["14.12.010","14.12.030"]},{"requirementId":"kcc-14-12-moderate-class-b-roof-covering","scopeKeys":["outside-fire-department","moderate-fire-hazard"],"scopeSummary":"The Class B-or-better floor applies only after the County assigns moderate hazard, only in an area outside a fire department; a written Fire Marshal alternative may control a specific project.","sourceSections":["14.12.010","14.12.040"]},{"requirementId":"kcc-14-12-low-general-class-c-roof-covering","scopeKeys":["unincorporated-county","low-fire-hazard"],"scopeSummary":"Class C is the general unincorporated-County floor and the stated low-hazard floor; the Class B and Class A rows replace it where the official hazard class is higher.","sourceSections":["14.12.020","14.12.050"]},{"requirementId":"kcc-20-10-ir1-one-hour-exterior-wall","scopeKeys":["ir1"],"scopeSummary":"This exterior-wall alternative applies only when the official Table 503.1 result is IR1; a documented product duration does not establish the complete exterior-side wall.","sourceSections":["504.5(1)"]},{"requirementId":"kcc-20-10-ir1-noncombustible-exterior-wall","scopeKeys":["ir1"],"scopeSummary":"This exterior-wall alternative applies only when the official Table 503.1 result is IR1; a documented noncombustible product does not establish the complete exterior wall.","sourceSections":["504.5(2)"]},{"requirementId":"kcc-20-10-ir1-ir2-one-hour-appendage","scopeKeys":["ir1","ir2","attached-to-habitable-space"],"scopeSummary":"Sections 504.7 and 505.7 apply this path to attached unenclosed accessory structures and projections such as decks after the official result is IR1 or IR2.","sourceSections":["504.7","505.7"]},{"requirementId":"kcc-20-10-ir1-ir2-noncombustible-appendage","scopeKeys":["ir1","ir2","attached-to-habitable-space"],"scopeSummary":"Sections 504.7 and 505.7 apply this path to attached unenclosed accessory structures and projections such as decks after the official result is IR1 or IR2.","sourceSections":["504.7","505.7"]},{"requirementId":"kcc-20-10-table-503-nc-exterior-wall","scopeKeys":["table-503-1-nc-result"],"scopeSummary":"This is an addition to the IR1 outcomes marked N.C. in the local routing table; the official hazard, water, and defensible-space inputs must yield that result first.","sourceSections":["Table 503.1"]}],"map":{"status":"declared-authority-wide","summary":"The current Fire Marshal page confirms that all unincorporated Kittitas County is WUI. Title 20 still requires the most-current County map and official water and defensible-space inputs before Table 503.1 yields the project result; this record does not attach the archived 2013 map as if it were current.","source":{"title":"Kittitas County Fire Marshal Wildland Urban Interface page","url":"https://www.co.kittitas.wa.us/cds/firemarshal/wildland-urban-interface.aspx","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},"projectTriggers":[{"summary":"Chapter 14.12 applies its roof-covering floors to new buildings, additions regardless of size, and existing buildings when 25 percent or more of the roof is reroofed.","sourceSections":["14.12.020","14.12.090"],"source":{"title":"Kittitas County Code Chapter 14.12","url":"https://ecode360.com/45415485","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"summary":"Title 20 Section 501.1 exempts specified noncommercial accessory structures no larger than 200 square feet and agricultural buildings when each is at least 50 feet from a building containing habitable space; the code official decides the project result.","sourceSections":["501.1"],"source":{"title":"Kittitas County Code Chapter 20.10","url":"https://ecode360.com/45426639","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"summary":"Title 20 Table 503.1 combines official hazard severity, water-supply conformity, and defensible-space conformity and can yield IR1, IR2, IR3, IR1 plus noncombustible one-hour exterior walls, or not permitted; a roof-covering match does not choose among those outcomes.","sourceSections":["Table 503.1"],"source":{"title":"Kittitas County Code Chapter 20.10","url":"https://ecode360.com/45426639","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}}],"localAmendments":[{"kind":"modification","section":"302.1","summary":"The County declares every unincorporated area WUI while retaining a most-current County map and official classification inputs for the project-specific construction result.","source":{"title":"Kittitas County Code Chapter 20.10","url":"https://ecode360.com/45426639","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"kind":"modification","section":"Table 503.1","summary":"The local routing table preserves distinct IR1, IR2, IR3, IR1 plus noncombustible one-hour wall, and not-permitted outcomes based on hazard, water, and defensible-space facts.","source":{"title":"Kittitas County Code Chapter 20.10","url":"https://ecode360.com/45426639","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}},{"kind":"addition","section":"14.12.020–14.12.050","summary":"The separate construction chapter sets a general Class C roof-covering floor, Class B in moderate hazard, and Class A in high and extreme hazard, subject to stated written Fire Marshal alternatives and more restrictive law.","source":{"title":"Kittitas County Code Chapter 14.12","url":"https://ecode360.com/45415485","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-26T00:00:00.000Z"}}],"supportingSources":[{"title":"Kittitas County current building codes and permitting page","url":"https://www.co.kittitas.wa.us/cds/building/default.aspx","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"},{"title":"Kittitas County Ordinance 2021-003","url":"https://www.co.kittitas.wa.us/uploads/bocc/ordinances/2021-003-ordinance.pdf","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z","documentDate":"2021-03-02T00:00:00.000Z"},{"title":"Kittitas County table of ordinances and resolutions","url":"https://www.co.kittitas.wa.us/boc/countycode/titleTOR.aspx","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"}],"unresolvedPredicates":["official-boundary","fire-department-boundary","official-hazard-map","official-hazard-class","project-type","effective-date","official-confirmation"],"source":{"title":"Kittitas County Code Title 20, Chapter 20.10 Wildland Urban Interface Code","url":"https://www.co.kittitas.wa.us/boc/countycode/title20.aspx","publisher":"Kittitas County","sourceType":"official","accessedOn":"2026-08-27T00:00:00.000Z"},"author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-27T00:00:00.000Z"}],"products":[],"matchContract":"Products appear only when their cited fields satisfy this requirement's normalized constraints. Application scope and unresolved predicates remain separate; an attribute match is not a permit decision."}