Abstract:By measuring the prolongation, tension and radial contractibility rate of wire and rope of the over-long (39m) samples of double twisted wire rope(6×19+1, 6×37+1), the following conclusions can be obtained:1. Without displacements at both ends of suspended cable, its Es has nothing to do with its length.2. When new wire rope is used as sample(its overtension is not tested in advance), r=0.37—0.414(r refers to the correction coefficient of Es and tested 9 times).3. After pretension of newer wire rope, r=0.605—0.715.4. Es is in direct proportion to the tension, and the relationship bet ween Es and the safetly factor of tension is one variable and two degrees curve(Fig. 5).5. To deduce formula W in theoretical value of Es in refrence[6], the corrected value of W is 2% less than the testing average valus of W, so accurate value of Es can be obtained from formula[6].6. As to the selection of Es, (0.37—0.414)E should be chosen for the skyline with short span (about 100m). It is suitable to choose(0.615—0.715) E for the cableway with longer span (about 500m).