POLE -LINE CONSTRUCTION 



57 



(c) Rock guys. A home-made iron eye-bolt 1 inch in diameter and not less than 

 18 in. long may be used' for anchoring a guy wire in rock. The angle formed by the 

 guy wire and the shank of the bolt should not be more than a right angle (Fig. 16). 

 The bolt should not be near the edge of the rock or ledge. 



(d) Guying across roads. If a guy wire, as ordinarily placed, would interfere 

 with traffic on a road, a stub should be used (Fig. 17) to provide proper clearance. The 

 stub should be stayed with the standard guy rod and anchor log; or if this is not- 

 possible, braced with anchor logs underground, as shown for the pole in Fig. 18. 



_ strands #9 B.W.6. galvanized /ro/ 

 w/ re fwisted together^ or four stranc 

 " 12 B. W G (shown as single w/re 

 to simplify ///ustrat/on ) 



Not Jess than 6 wraps 



I inc-h diameter iron rod not /ess 

 than /8 inches //? length f depending 

 on nature of roc k 



Do not locate near 

 the edge of the rock 



Fig. 16 Rock guy bolt 



3 SELF-SUPPORTING POLES 



Where conditions prevent the use of any other method of guying, and especially 

 in swampy soil, the poles should be braced with anchor logs, >as illustrated in Fig. 18. 



The problem of supporting poles in muskegs is often a difficult one. Where 

 ordinary methods of single bracing or guying will not suffice two or even four brace? 

 may sometimes be necessary in addition to anchor logs placed as shown in Fig. 18. 



4 TRIPODS 



The difficulties encountered in supporting poles in muskegs are often increased 

 by unusual soil conditions which make the digging of holes very costly. Some success 

 has been met in the employment of tripods instead of poles in crossing such muskegs. 

 These tripods are constructed of peeled poles having a butt diameter of 5 in., top 

 diameter of not less than 3 in., and a length of 22 to 24 ft. Lodgepole pine is the most 

 suitable material, but spruce, tamarack, or jack pine may be used. Each tripod con- 



