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fencing questions about metal vs. wood
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<blockquote data-quote="greybeard" data-source="post: 1336801" data-attributes="member: 18945"><p>That's why they are being pulled out of the ground, 5-6" diameter is too small diameter for corners and gate bearing posts, and perhaps because they weren't set deep enough, or were not 'set' (backfilled & tamped) correctly when first installed. </p><p>The larger the diameter post you use, the more resistance to movement you have. An 'H' type corner of 8" cross ties or 8" cut-to-length utility poles have worked here in wet East Texas for decades and decades, set 4' deep with no leaning or heaving out of the ground. You can also increase the surface area the post has by increasing the depth of the hole significantly, tho shouldn't be necessary if a large diameter post is used.</p><p></p><p>(that's also another aspect you 'may' have happening--frost heaving of the post. I have a friend in Maine, that has big problems each winter of deep frost pushing all his posts up. He has to go pound his posts back down every spring) </p><p></p><p>If you are going to use smaller diameter posts (of any material) you will have to increase the total cross section presented to hole sidewall of resistance, usually by adding another post to each side of the corners or even a diagonal to a deadman, or find some way to set them much deeper.</p></blockquote><p></p>
[QUOTE="greybeard, post: 1336801, member: 18945"] That's why they are being pulled out of the ground, 5-6" diameter is too small diameter for corners and gate bearing posts, and perhaps because they weren't set deep enough, or were not 'set' (backfilled & tamped) correctly when first installed. The larger the diameter post you use, the more resistance to movement you have. An 'H' type corner of 8" cross ties or 8" cut-to-length utility poles have worked here in wet East Texas for decades and decades, set 4' deep with no leaning or heaving out of the ground. You can also increase the surface area the post has by increasing the depth of the hole significantly, tho shouldn't be necessary if a large diameter post is used. (that's also another aspect you 'may' have happening--frost heaving of the post. I have a friend in Maine, that has big problems each winter of deep frost pushing all his posts up. He has to go pound his posts back down every spring) If you are going to use smaller diameter posts (of any material) you will have to increase the total cross section presented to hole sidewall of resistance, usually by adding another post to each side of the corners or even a diagonal to a deadman, or find some way to set them much deeper. [/QUOTE]
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