David Duckbills have not worked for us. We've not been able to get screw in anchors past the rock. 4'-5' x 3" channel iron often takes my 60,000 lb excavator to pull out of the ground. Broken regular hard steel tow chain trying to pull them out. That said, if not driven deep so as to only be an inch or two above soil they are wicked on tire sidewalls. We've been using 4' x 5" pt posts driven in as far as possible lately, but I like the channel iron especially if all you have is a twenty pound sledge and a younger guy to drive them.
Mo Tougas On Thu, Mar 30, 2017 at 4:47 PM, Kurt W. Alstede <k...@alstedefarms.com> wrote: > Hello David, > > We only use the screw in anchors on our trellis structures when they are > needed. We have very similar soil types to you here in Northwest New > Jersey. Years ago we tried the drive in duck bills and they easily pulled > out of the soil and did not work. I just don't think that there is enough > surface area under the ground to withstand the force that they must > withstand. > > I hope that this information is helpful. > > Best, > > Kurt > > Kurt W. Alstede > General Manager, > Alstede Farms, LLC > P.O. Box 278 > 1 Alstede Farms Lane, > Chester, New Jersey 07930 > United States of America > > Tel: 908-879-7189 > Fax: 908-879-7815 > www.alstedefarms.com > > > > > > > -----Original Message----- > From: apple-crop [mailto:apple-crop-boun...@virtualorchard.com] On Behalf > Of David Kollas > Sent: Thursday, March 30, 2017 4:31 PM > To: Apple-Crop discussion list > Subject: [Apple-Crop] Soil Anchors > > Does anyone have experience with duckbill-type earth anchors for > row-ends in trellis orchard or vineyard? > > Compacted glacial till is a common feature below about 18-20 > inches here. I am looking for anchoring against possibly as much as 2000 > pounds force. Can aluminum duckbills be driven into glacial till? Does > galvanized cable > rust out after a few years? Other important observations? I didn’t > mention that the soils here are abundantly > supplied with a wide range of stone sizes and types. > > David Kollas > Kollas Orchard > Tolland, CT > > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.com > http://virtualorchard.com/mailman/listinfo/apple-crop > > _______________________________________________ > apple-crop mailing list > apple-crop@virtualorchard.com > http://virtualorchard.com/mailman/listinfo/apple-crop > -- Maurice Tougas Tougas Family Farm Northborough,MA 01532 508-450-0844
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