ELEVATOR LOAD BEARING ASSEMBLY HAVING AN INITIAL FACTOR OF SAFETY BASED UPON A DESIRED LIFE OF SERVICE,

摘要

pA load bearing assembly (30) of an elevator system (20) includes a plurality of load bearing members (34) that each have a selected strength. The number of load bearing members (34) and their associated strengths provide an initial factor of safety for the load bearing assembly (30). The initial factor of safety is selected based upon a relationship between a determined desired life of the load bearing assembly (30) and a desired retirement strength of the load bearing assembly (30) at the end of the desired life./p[WO2008140520A1]