{"id":"e6d98cdc-4781-4947-b255-194d0aee63d8","task":"Determine whether ANSI A326.3 DCOF testing applies to, and reliably measures, a polished concrete floor","domain":"slip-resistance","steps":["Confirm ANSI A326.3 (Tile Council of North America / ANSI, current edition reflecting the 2021 revision with the 2022 five-category product-use DCOF classification) explicitly includes polished and unpolished concrete within its scope of hard-surface flooring materials, alongside tile, stone, and other hard surfaces.","Select the applicable use-category minimum wet dynamic coefficient of friction value, since the standard sets different minimums for different use categories rather than a single universal number for every space.","Be aware that some polished concrete and polished stone surfaces can produce artificially high DCOF readings on common test devices due to a stiction effect (the test slider sticking to a very smooth polished surface), which can mask real slip risk.","Where results seem unexpectedly favorable for a highly polished floor, flag the stiction limitation and consider supplementing with real-world traffic experience or an alternate assessment rather than relying solely on one lab reading.","Document the specific gloss level/finish tested, since DCOF on the same slab can differ meaningfully between a matte honed finish and a high-gloss polished finish."],"gotchas":["Do not assume ANSI A326.3 excludes concrete -- its scope explicitly names polished and unpolished concrete as covered materials.","A passing DCOF number on a highly polished surface should be treated cautiously given the documented stiction issue with common DCOF test devices on very smooth polished floors."],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","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/e6d98cdc-4781-4947-b255-194d0aee63d8"}