I can't remember where or when I heard it. But I've always used one and one half times the material thickness for the depth of a hole for pipe or tubing.
So a one and a half schedule forty pipe would be approximately three inches. (1 7/8" X 1.5 would be 2 3/4")
I don't believe I pulled this out of the air. I'm comfortable with saying it's something an engineer or someone close to one told me.
Am I wrong?
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10-15-2010, 06:51 AM #1Senior Member
- Join Date
- Sep 2006
Drilling depth for posts in concrete