First I framed the top and bottom of the hole to attach form sides, to keep dirt from falling in the hole – the dirt is really the form here. Bottom frame ID 47″ x 35″, top frame 40″x30″ to give pyramid shape to eliminate frost heave. Next I set and leveled the rebar, then bolstered the forms to make ready for the pour.
I calculated two yards of concrete to fill the forms with a little extra, so I made up a form to use any excess for guy wire sleepers. No guys for this tower but who knows what the future may bring?
I followed the Hygain tower recommendations for the rebar but made the block larger (two yards concrete vs 1 yard) for a safety margin. The block sits on ledge rock and should be very secure.
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