22 BULLETIN 495, U. S. DEPARTMENT OF AGRICULTURE. 
Wooden posts or black-steel pests 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 feet 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 where 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 

Fic. 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 
the 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. 14 galvanized 
wire spaced 15 to 18 feet apart. The 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. 


