I need to pour three anchors (I'll call them that) for a 32' long x 12" wide
lean to metal awning. The frame will be made of 14 ga. 8" and 6" C purlin
materials. Covered by 26ga. steel sheets. Corners 3" x 3" x .120" posts.
Three posts will go on an existing slab, the top purlin will be attatched to
the house. At the downhill edge, I will have the three posts that Ill need
I have caliche there. I do not want to spend the time and money
jackhammering out caliche. So, I want to form and pour concrete. I would
like to make it square, and to a dimension that will allow it to be tiled in
most any configuration of 6" multiples.
In your expert estimation, how much mass do you think I would need to act as
these anchors? I was thinking of 12 cubic feet, a 3' square with a 3' tall
square or Snotube column coming up the steel to stave off rust at ground
They will also be two staged, that is a small cube sitting on top of a
larger one, or a Sonotube going down into a larger diameter base. I really
don't want them to come up too high, so will probably go with the two step
idea. It will have rebar throughout, and the rebar will be welded to the
legs in the concrete.
My Pocket Ref does not give approximate weight of dried concrete per cubic