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BELL SYSTEM TECHNICAL JOURNAL 



Naturally, the greatest economies may be made in the application 

 of this apparatus where the poles to be handled constitute a con- 

 secutive line, the holes for which have been dug in advance. How- 

 ever, because of the short time required for assembling and taking 

 down the derrick, it is generally economical to use it for placing only 

 one or two poles at a location. As indicative of the possibilities with 

 regard to rapidity of operation, it may be of interest to note that in 

 erecting a number of 30 to 35 foot poles under average conditions in a 

 line for which the holes had previously been prepared, a gang of three 

 men have averaged approximately two minutes per pole erected but 

 not tamped. 



The use of the derrick has thus far been described as applied to 

 the economical erection of poles. There are, as a matter of fact, 

 many other important uses for which the winch-operated, derrick 

 equipped truck is well adapted, a few of which are enumerated below. 



Fig. 3— Derrick in Position to Pull Pole Out of Ground 



Road and highway changes and improvements throughout the 

 country make it necessary for the telephone companies to annually 

 move thousands of poles to the new highway limits or curb lines. 

 In many instances these pole lines carry heavy loads of wire or cable 



