TABLE 3. TEST FOR TOTAL STRETCH OF 0. 170" DIA. CABLE (150-FT LENGTH) 





Number of Turns 



Time 







Load 



To To 



From Start 



Stretch 





(lb) 



Unwind Wind 



(hr) 



(in. /50 ft) 



Notes 



1000 









4.00 



Test cable up in the control 

 tower through three sheaves. 

 Elastic stretch at loading. 





100 



96 



6.0 







129.75 



120 









63.75 











34.5 











21.0 





6.35 







15.5 



168 



6.35 







5.25 











6.5 











3.00 



288 



8.0 

 8.35 







Load raised 50 feet 











Load lowered 50 feet 



336 



8.83 



Total elongation 26. 5" 



500 



Load raised 50 feet 

 Load lowered 50 feet 



408 

 456 



6.50 



7.50 



7" relaxation 





51.75 



504 



2.12 







13.5 





2.83 













When the final increment of load 











was released and the cable re- 











laxed for 48 hours , the cable 











was back to its original length. 



16 



