240 



ENGINEERING ON THE FARM 



Fig. 203. A wire splicer that can be 

 made from one- half of a strap hinge 



reasonable limits. When the wire is being stretched over 

 uneven ground, a man should walk along the line and lift 

 the wire from the ground in places where it strikes, so that 



the tension will be even 

 throughout the entire 

 length. All horizontal 

 wires should be stapled at 

 every post, but the staples 

 should not be driven] so 

 far that they kink or push 

 the wire into the post. 

 Manufacturers of woven 

 wire publish catalogs in 

 which they give complete 

 descriptions for placing 

 corner posts and stretching their materials. Such in- 

 structions should be followed by the purchaser, due allow- 

 ance of course being made for the local conditions. 



Temperature effects. 

 The tension of the wire is 

 affected by changes of 

 temperature. A straight 

 wire stretched very tight 

 in hot weather is liable to 

 break in cold weather, and 

 if stretched in cold weather 

 may become slack in hot 

 weather. This condition 

 is overcome in the manu- 

 facture by the method of 

 slightly springing or coiling 

 the wire so that the spring 

 adjusts for temperature. 



Inspection. After a fence is completed, it should be 

 inspected at regular intervals, loose wires tightened, and 

 staples that may have pulled out replaced. 



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W- =//;/^////s///t=J///^ //U 



Fig. 204. Method of anchoring the 

 wire to the ground in de- 

 pressions 



