By foundation I am referring to the concrete base of the pier; the cap of an upside down mushroom if you will. I started by putting one 30kg bag of gravel into the hole, packing it down firmly. I then cut a section of steel fencing off the roll and formed it into a cylindrical cage of about 1/2 the diameter of the sonotube, so about 5". On the bottom I made a little mushroom shape so that the metal cage would stand up in the hole by itself plus add some reinforcement to the concrete foundation. I then mixed up one 30kg bag of concrete and poured it all into the hole. I had a while to wait while this pour set, so I rested some boards against the cage to give some support, then extended the cage upwards to just below the height of my pier, about 48" above ground level. I then covered the whole thing with a tarp and went to see Monty Python live via satellite with a buddy. Click on the images below to enlarge them.
We at Hempstead Fence Company understand that fence installation is very important when it comes to enhancing privacy and security of private property.
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Jim is an aerospace engineer living and working in Ottawa, Canada. He is also an amateur astronomer.