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WC MO | I wish that Chance would market these auger piers for pole barn use. Wouldn't be perfect, but all it needs is an "adapter" sleeve that bolts to the top that three laminated 2x8's would fit into. Any type of out-of-plumb issue could be easily rectified with spacer washers between the post top plate and the adapter.
http://www.abchance.com/resources/literature/lighting/02-9705.pdf
These things are make in diameters from 1" up to 10" diameter in a multitude of lengths.
I told the sales rep that the small ones they make would be great for post bases on residential decks for holding a 4x4 or 6x6 post. Rep in Kansas City is Electrical Midwest, talk to Scott Marlo. The website has a calculator feature that figures what size you would need if you know enough about structural engineering to know your loadings.
You or someone you know probably already has a tractor-mounted auger adequate to drive them. One of the key engineering principles about these load bearing augers is that they do not remove earth, they displace it and it packs around the outside. The larger diameter the center column, the more load capacity it has. Also, the deeper it is driven, the more capacity it has but also the harder it gets to drive. The auger head has to be high torque low speed. The drive adapter most of you would not have any trouble fabricating on your own to save that cost, but they are available from Chance in most common hex sizes.
You keep it plumb by putting two magnetic torpedo levels on the side of the drill head and run it in slow. If it doesnt drive correctly, it is easily backed out, but it can be corrected as it goes. In fact, it can be easily removed and re-used years later if necessary. They could be used as foundations for weigh scales and many other on the farm uses.
Edited by trailcutter 7/14/2010 16:32
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perma columns for pole building
