### Question
What does friction surface mean?


### Answer
**Friction surface** has the following meaning in *42 U.S.C. § 4851b*:

> an interior or exterior surface that is subject to abrasion or friction, including certain window, floor, and stair surfaces

#### Citation:
  - *42 U.S.C. § 4851b*
  - Heading: **CHAPTER 63A-RESIDENTIAL LEAD-BASED PAINT HAZARD REDUCTION**

