Would a wall typically be considered a friction surface when assessing lead hazards?

When assessing lead hazards, a wall is generally not considered a friction surface because friction surfaces are typically areas where two surfaces come into repetitive contact that could generate lead dust or chips from lead-based paint due to wear. Common examples of friction surfaces include windows, doors, and other moving parts that experience frequent contact.

In the context of a wall, it does not usually experience the same type of repeated mechanical wear or contact as surfaces like windows or door frames would. Although a wall can have lead-based paint, unless it is being actively scraped or abraded through wear and tear, it is not classified as a friction surface. Thus, the reasoning behind the response is consistent with the definitions and characteristics of surfaces deemed at risk for lead exposure.