Stairs of all Types have been Used Since Ancient Times, and Because They are Inherently Hazardous, People have been Falling on Them, Getting Hurt or Even Killed In; the Process. In North America, Tens of People Die and Tens of Thousands of People Get Injured Every years from the Falls on Stairs. the American National Council On; Compensation Insurance Estimated in 2001 2002 that the Cost of such Fall Injuries was Second only to Those Caused by Motor Vehicles; Tredsafe Leads the Way in Safety, Flooring Industry ...