Stresses in rails static stress measurements in holes of different diameters, in the web of 109 Lb./Yd. F.B. rail (E-263)

Report E.184 dated October 1958 described fatigue tests on 109 lb./yd. F.B. rail specimens with fishbolt holes drilled three different diameters viz., 15/16", 1.3/16" (the present standard) and 1.1/2". Report E.233 dated March 1960 described service stress measurements in rail ends having fishbolt holes of the two smaller diameters. The...