Flooring · definition
NWFA appearance classifications (Clear, Select, #1/#2 Common) based on color variation, knots, and character — a look-and-cost choice, not a strength rating.
Source: NWFA — Technical Standards
Where this comes up
Where this term lands on a Columbus budget
The cost pages carry the current local ranges, and the guides explain what moves them. A published range becomes a project number only after someone looks at the site.