The posts are likely to have been pulled by well stretched fence wire. The winter temps shrink steel. the factor is only .000012 inches per inch of run, per degree C, but with a fifty degree difference, it amounts to about a half thousandths per inch. If posts are spaced @ 20' or 240". this equals about .15 inches per post span. from both sides, and possibly farther down the fence than one would expect. There might be as much as a half inch pulling on the angle of the wires. Coupled with the tensile strength of the wires at probably 1500 pounds each, this would certainly pull the posts.
I would put galvanized trampoline springs in the wires where they go up the sides of the dip. The springs are powerful and cheap. JimN
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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