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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
How to fit a pole in deepfreeze conditions?
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<blockquote data-quote="PGH" data-source="post: 134239" data-attributes="member: 176164"><p>The reason for the high-density polystyrene is to insulate the concrete from the ground underneath. This is to stop this ground from freezing, which would produce a differential expansion in the ice and tilt the concrete plinth. The reason for the depth of concrete is to get below the frost layer so the ground doesn’t freeze from the sides and not to provide any extra mechanical stability. I live further north and so the effects are more pronounced, but my first attempts at casting a base for my 2m dish, without insulation, resulted in a near 10 degree tilt!!</p></blockquote><p></p>
[QUOTE="PGH, post: 134239, member: 176164"] The reason for the high-density polystyrene is to insulate the concrete from the ground underneath. This is to stop this ground from freezing, which would produce a differential expansion in the ice and tilt the concrete plinth. The reason for the depth of concrete is to get below the frost layer so the ground doesn’t freeze from the sides and not to provide any extra mechanical stability. I live further north and so the effects are more pronounced, but my first attempts at casting a base for my 2m dish, without insulation, resulted in a near 10 degree tilt!! [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
How to fit a pole in deepfreeze conditions?
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