On Jun 23, 9:12*pm, Some Guy wrote:
Steve B wrote:
I want to pour some Sonotube bases for a metal awning and use the
weight of it to hold down the 3" x 3" x .120" posts.

You mean the posts are 10-feet long, right?

You can get 3"x3" posts that are 10-feet long?
The posts come 20' long each, and I can cut to length.

When someone says "post", I think of wood. *Rectangular wood posts. *Not
metal pipe.

I live in a very dry climate. *Exposed structures made of
wood don't do as well as metal because of the freeze/thaw
cycles. *Wood dries out and cracks here really bad.

Cracking I can understand, but if it's so dry I don't see how there can
be freeze-thaw cycles without some humidity or water getting into the
wood.

I live in the great-lakes area. *We have lots of humidity and
freeze-thaw cycles in the winter. *Exposed wood (like fences) don't seem
to suffer cracking or dammage from freezing and thawing (but fence posts
and fence runners do seem to warp over time - probably because of post
movement below grade).

I did the last Sonotube bases out of 30" tubes. *

That's insane. *I wouldn't have thought that sonotube cardboard was
strong enough, but I guess it's a function of height more than width or
diameter.

I used a total of 2 cubic yards for the three bases,

That's insane. *That's about 6600 lbs. *I would never want that much
concrete to hold an awning up. *Expecially above grade. *What an eyesore
that must look like. *Lots of wasted space taken up by that concrete.

You're wasting your time, the dude seem to think he needs a couple
tons of concrete to hold down an awning.