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Old 14-11-2019, 08:18 PM
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Sunfish (Ray)
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Join Date: Mar 2018
Location: Wollongong
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Screw piles are a fine alternative to drilled and filled concrete piers in soft ground which is their intended use. Really an alternative to hammered piles. Not too good in rocky soil or with big floaters and no cheaper than concrete as cost is not their advantage. There are many types of small scale angled pile footings that can be placed using a jackhammer which are not really screw piles but affective if access is a problem. Not necessarily better or cheaper or as long lasting as concrete but that may be fine for a telescope mount, (or a granny flat in soft soil with no services nearby)
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