Fluctuating-tension tests have been undertaken to assess the fatigue strength of a new form of splice for joining 0.2-in-diameter high tensile steel wire. The mean stress level for most of the tests was that appropriate to the suspension bridge main cable
higher mean stresses more relevant to prestressed concrete condiapplication, 40 tons/in2. In a more limited number of tests, however, higher mean stresses more relevant to prestressed concrete conditions were used. The results obtained indicate a probable safe stress fluctuation for a limited life.