{"id":"fire-retardant-treated","license":"CC-BY-4.0","data":{"term":"fire-retardant-treated wood","shortDef":"Wood treated to reduce flame spread, often listed as exterior FRT. Oregon R327 names it as one walking-surface path. It is not noncombustible and not a coating.","alsoCalled":["FRT wood","exterior FRT"],"doNotSay":["fireproof wood"],"relatedGlossary":["ignition-resistant","noncombustible"],"relatedCategories":["decking"],"relatedStandards":["sfm-12-7a-4"],"relatedGuides":["spray-frt-special-inspection"],"author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-23T00:00:00.000Z"}}