{"id":"mech-002","license":"CC-BY-4.0","data":{"title":"Steiner tunnel and the E2768 extension","file":"/diagrams/mech-002-steiner-tunnel.svg","caption":"FA Exhibit MECH-002. E84 is a 10-minute tunnel. Oregon ignition-resistant uses an extended run. Not a WUI listing and not noncombustible.","alt":"Schematic of the Steiner tunnel showing the 10-minute ASTM E84 run and the 30-minute E2768 extension used for ignition-resistant material.","kind":"diagram","rights":"cc-by-4.0","depicts":"ASTM E84 versus E2768 duration for ignition-resistant definitions","identifiableAddress":false,"exifGpsStripped":true,"derivation":"After ASTM E84-24 public scope and Oregon R327.2 ignition-resistant definition. Not-to-scale.","technicalReviewer":"Grayson Graham","lastVerified":"2026-08-23T00:00:00.000Z","sourceUrl":"https://www.astm.org/e0084-24.html"}}