Abstract: A fall arrest system adapted to prevent falls while climbing structures. A fall arrest system adapted to prevent lineman from falling from power poles during maintenance or repairs to various elements associated with the suspension and switching on transmission and/or distribution power grids. The system can comprise a safety belt type device comprising an inner strap assembly and an outer strap assembly for encircling a structure to be climbed. The system can comprise many materials in order to meet certain criteria, such as strength and/or stiffness. Additionally, the system can be easily manipulated as the user climbs up or down the structure to maintain the proper angle of the belt with respect to the user.