64 BELL SYSTEM TECHNICAL JOURNAL 



Fewer men are required for loading, unloading and "setting-up." 

 For example, two men with a chauffeur and truck (not neces- 

 sarily equipped with a winch) can satisfactorily handle a 3-ton 

 reel of cable with the trailer, where ground conditions are such 

 that they can maneuver the reel on the ground. 



Where a single reel of cable is to be used for one "pull" or for 

 a number of short "pulls," the trailer is used to haul the reel to 

 the job and to "set up" the reel for each "pull." The reel may 

 be trailed, in addition to carrying materials, tools, etc., in the 

 body of the truck, thus making it unnecessary to unload or dis- 

 arrange the equipment regularly carried on the truck. 



When delivering a number of reels, one reel may be trailed 

 in addition to carrying one or more on the body of the truck, 

 thus materially increasing the hauling capacity of the truck, 

 with a proportionate reduction in delivery costs. 



As the photographs indicate, these trailers are equipped with 

 springs and rubber tires which afford material- protection to the 

 cable while in transit. 



Pole Trailers 



For the transportation of poles under ordinary conditions, the 

 use of a two-wheel trailer with the poles balanced on the trailer and 

 towed behind the truck is ordinarily the most satisfactory method. 

 Fig. 11 shows such a trailer loaded and ready for action. 

 This method has the advantage that the trailer loaded with poles 

 can be readily detached from the truck and left at any desired loca- 

 tion, thus releasing the truck for other work. Also, in case of the 

 load being stuck on a hill or in the mud, the trailer can be readily 

 detached while the truck runs forward and from the top of the hill 

 or from firm ground, pulls the trailer load of poles by means of the 

 winch line. 



Limiting the weight to conform with requirements of state laws 

 materially limits the size of the load in hauling chestnut and creosoted 

 pine poles. However, in the case of cedar poles, the bulk of the load 

 rather than its weight is ordinarily the limiting factor. 



To meet these different conditions, three sizes of pole trailers have 

 been designed, a heavy duty trailer rated at about 8 tons with ample 

 overload capacity, a medium duty trailer rated at 5 tons, and a light 

 duty trailer of 2}^ ton capacity for use in districts where it is desir- 

 able to maintain a standard tread between the wheels rather than to 

 use the narrow tread dinkeys for the lighter pole loads. 



