456 



ENGINEERING ON THE FARM 



Poles are usually set in the ground one-fifth of their 

 length. They should be treated with a preservative at the 

 butt end to a point which will be a foot above the ground 

 when the poles are 

 set. The bulletins 

 of the United States 

 Department of Agri- 

 culture should be 

 consulted regarding 

 the selection and use 

 of preservatives. 



An essential fea- 

 ture of pole setting 

 is that of tamping 

 the earth about the 

 pole as the earth is 

 being replaced in the 

 holes. If it is not 

 tamped thoroughly, 



Fig. 349. Braced pole 



it will settle unevenly and throw the poles out of alignment. 

 On sharp curves and at corners the poles should be guyed 



Fig. 350. Anchored pole with stub to carry guy wire over a road 



