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BULLETIN 195, U. S. DEPARTMENT OF A.GRICULTUKE. 



Wooden posts <>r black-steel posts should be painted with tar or 

 treated with creosote. The posts should be considerably higher than 

 the nozzle line, depending upon the distance between posts and the 

 weight to be supported. It is -well to set the bases of the posts in 

 beds of concrete about 18 inches in diameter and 3 feel deep. The 

 end posts and cables must be well anchored with guys fastened to 

 wooden or concrete " deadmen." A 5-foot anchor rod should be 

 attached to the deadman and extended above the surface with an 

 eye when' a turnbuckle and a guy wire can be attached, as shown 

 in figure 15. Single guys are used where the tops of the end posts of 

 several lines can be connected with a guy wire perpendicular to the 

 nozzle lines, otherwise double guys should be used. The deadman 



Fig. 14. — Overhead spray-nozzle lines suspended from high posts by cable line. 



should be at least a distance equal to one-third the height of the post 

 from the post's base. 



The weight of cable to use for each particular case should be deter- 

 mined by an engineer familiar with this construction after he has 

 been given the length of the line, the weight to be supported, and 

 tin- spacing of posts. The manufacturers of cables are prepared to 

 recommend necessary size and kind of cable. It is well to use dou- 

 ble galvanized materials, which will be lasting. The pipe is sus- 

 pended from the cable with short lengths of about No. 1+ galvanized 

 v ire spaced IT. to 19, feet apart. Tiie nozzle line is hung in special gal- 

 vanized-metal hooks containing rollers to make the pipe turn easily, 

 and an eye for attaching to the suspension wire. The nozzle line can 

 be graded by adjusting the lengths of the suspension wires. 



