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<blockquote data-quote="fence_it" data-source="post: 1533349" data-attributes="member: 30068"><p>It doesn't take much to break 12.5ga low carbon with a come-along. Just think, we stretch 9 wire high tensile field fence with only 2 of them! (And we use one tons)</p><p></p><p>I think the break strength on the low carbon barb we use is 930lbs. Some specifications call for the barb wire to be pre stretched and then let off, or it will go slack over time. The BC agricultural fencing handbook mentions this. </p><p></p><p> "During manufacture, two strands of wire are "twisted" together to form a single, double strand wire but these are not always pulled tightly together. For this reason, when constructing a fence using two strand barbed wire the two strands must be prestretched or pretensioned to ensure the fence wire performs as a single unit, not as two separate wires. This involves tensioning the wire up to about 600 pounds and then relaxing to the normal wire tension of 250 pounds before stapling. Failure to pretension two-strand barbed wire will result in loose fence wires a year or two after construction."</p><p></p><p>"Barbed wire is also manufactured from high tensile (ht) steel in either one or two strands. Two strand 15½ ga. ht barbed wire has the same breaking strength but about one half the weight of common barbed wire. "</p><p></p><p><a href="https://www2.gov.bc.ca/gov/content/industry/agriculture-seafood/business-market-development/structures-mechanization/agricultural-structures-fencing" target="_blank">https://www2.gov.bc.ca/gov/content/indu ... es-fencing</a></p></blockquote><p></p>
[QUOTE="fence_it, post: 1533349, member: 30068"] It doesn't take much to break 12.5ga low carbon with a come-along. Just think, we stretch 9 wire high tensile field fence with only 2 of them! (And we use one tons) I think the break strength on the low carbon barb we use is 930lbs. Some specifications call for the barb wire to be pre stretched and then let off, or it will go slack over time. The BC agricultural fencing handbook mentions this. "During manufacture, two strands of wire are “twisted” together to form a single, double strand wire but these are not always pulled tightly together. For this reason, when constructing a fence using two strand barbed wire the two strands must be prestretched or pretensioned to ensure the fence wire performs as a single unit, not as two separate wires. This involves tensioning the wire up to about 600 pounds and then relaxing to the normal wire tension of 250 pounds before stapling. Failure to pretension two-strand barbed wire will result in loose fence wires a year or two after construction." "Barbed wire is also manufactured from high tensile (ht) steel in either one or two strands. Two strand 15½ ga. ht barbed wire has the same breaking strength but about one half the weight of common barbed wire. " [url=https://www2.gov.bc.ca/gov/content/industry/agriculture-seafood/business-market-development/structures-mechanization/agricultural-structures-fencing]https://www2.gov.bc.ca/gov/content/indu ... es-fencing[/url] [/QUOTE]
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