TABLE 6. TEST FOR STRETCH CHARACTERISTICS OF PRELOADED WIRE 

 CABLE 3 X 19D, SPECIMEN 474, 3/32" DIAMETER, REEL 34893 

 (100-FT LENGTH) 





Number of Turns 



Time 







Load 



To To 



From Start 



Stretch 





(lb) 



Unwind Wind 



(hr) 



(in. /50 ft) 



Notes 



292 



2.33 







-0.03 



Data required were limited to 





Load raised 50 feet 



48 



0.28 



stretch characteristics after 





Load lowered 50 feet 



72 



0.72 



preload; therefore, the prelimi- 





67.5 







nary stretch measurement was 





20.0 







not taken. 





7.5 











4.5 



144 



0.72 





196 







-0.28 



As the load was lightened, the 





10.5 





-0.31 



reduction in elongation extended 





Load raised 50 feet 



192 



-0.37 



negatively from the initial 





Load lowered 50 feet 



288 

 312 



-0.47 

 0.41 



measurement. 





1.0 











10.0 









100 







1.94 







Load raised 50 feet 



336 



-1.97 







Load lowered 50 feet 



360 



-2.12 







15.0 











6.0 



384 



-2.12 













0.00 



No permanent stretch. 



20 



