The 2017 A326.3 edition used 0.42 on level wet interior floors
The Tile Council questions page says ANSI A326.3 is used as a method that gives repeatable DCOF data. It then describes the 2017 edition in one sentence: hard-surface flooring needed a dynamic coefficient of friction of at least 0.42 for level interior floors expected to be walked on when wet with water.
What changed after that edition
The same answer says the 2021 revision is the edition that carries the product-use classes. This note does not recopy that later table. The 0.42 sentence is the 2017 rule for that level, water-wet interior case.
The test itself stayed
Sections 5.0 onward of the updated standard still describe how to measure the ratio in the lab and in the field, wet or dry. The page separates that method from the older single cutoff.
Source
Fetched 2026-10-11 from Tile Council DCOF questions. The sentences above follow that page. They are not a contractor promise.
Related notes
- Tile notes index
- The five A326.3 use classes do not cover ramps
- One hard floor can carry more than one A326.3 use class
- Floor photos
Send photos if you want another person to look at the area. This note does not set a response time.