TELEPHONE LINE WIRE SPACING PROBLEMS 



209 



60,000 



40,000 

 30,000 



20,000 



10,000 

 8000 

 6000 



4000 

 3000 



2000 



(0 1000 



a 



O 800 



cr 



Lu 600 



Q. 

 UJ 



(- 400 

 ? 300 



•" 200 



^ 100 

 3 80 



II 16 21 26 31 36 41 

 TO TO TO TO TO TO TO 

 15 20 25 30 35 40 45 

 WIND VELOCITY IN M 



46 51 56 61 66 71 76 81 86 



TO TO TO TO TO TO TO TO TO 



50 55 60 65 70 75 80 85 90 



LES PER HOUR 



Pig. 9 — Distribution of the annual maximum and five-minute average 

 wind velocities. 



