{"id":"det-012","license":"CC-BY-4.0","data":{"title":"Bird-block retrofit: mesh vs listed vent swap (compliance pair)","file":"/diagrams/det-012-bird-block-vent-retrofit-pair.svg","caption":"FA Exhibit DET-012. Bird-block retrofit: screen patch versus manufactured vent swap.","alt":"Two schematic eave sections for an underside opening below twelve feet. At left, insect or bird screen is fastened over a straight-through bird-block opening; embers can follow the straight opening and the patch does not meet Oregon R327's special below-twelve-foot underside exception. At right, the opening is replaced by a noncombustible manufactured flame- and ember-resistant vent with an indirect schematic path, presented as a route for building-official review rather than automatic approval.","kind":"diagram","rights":"cc-by-4.0","depicts":"For an underside eave opening below 12 feet in an Oregon R327 jurisdiction, fastening ordinary insect/bird screen across the existing bird-block opening does not satisfy the specific R327.3.2.1 exception","identifiableAddress":false,"exifGpsStripped":true,"derivation":"AFTER FEMA P-737 FIG. 11, §4.2.1 & TABLE 6 · 2023 ORSC R327.3.2 & R327.3.2.1.","technicalReviewer":"Grayson Graham","lastVerified":"2026-08-25T00:00:00.000Z"}}