### Question
Can you define what friction surface means?


### Answer
**Friction surface** is defined as the following in *15 U.S.C. § 2681*:

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

#### Citation:
  - *15 U.S.C. § 2681*
  - Heading: **CHAPTER 53-TOXIC SUBSTANCES CONTROL > SUBCHAPTER IV-LEAD EXPOSURE REDUCTION**

